User equipments and communication methods for sidelink communication

ABSTRACT

User equipments (UEs) and communication methods for sidelink (SL) communication are described. The UE comprises receiving circuitry, determining circuitry and transmitting circuitry. The receiving circuitry is configured to receive a radio resource control (RRC) message comprising first information used for configuring one or more resource pools for SL transmission(s) within one or more SL bandwidth parts (SL BWPs). The determining circuitry is configured to select a SL resource for transmission of a Physical Sidelink Control Channel (PSCCH) and a Physical Sidelink Shared Channel (PSSCH) associated with the PSCCH. The transmitting circuitry is configured to transmit first-stage SL control information (SCI) over the PSCCH and to transmit the PSSCH associated with the PSCCH, wherein second-stage SCI is carried on the PSSCH, and the first-stage SCI provides scheduling information of the PSSCH, and indicates a format of the second-stage SCI.

CROSS REFERENCE

This Nonprovisional application claims priority under 35 U.S.C. § 119 toProvisional Patent Application No. 62/790,345 filed on Jan. 9, 2019, theentire contents of which are hereby incorporated herein by reference.

TECHNICAL FIELD

The present disclosure relates generally to communication systems. Morespecifically, the present disclosure relates to user equipments, basestations and methods for sidelink (SL) communications.

BACKGROUND ART

Wireless communication devices have become smaller and more powerfulorder to meet consumer needs and to improve portability and convenience.Consumers have become dependent upon wireless communication devices andhave come to expect reliable service, expanded areas of coverage andincreased functionality. A wireless communication system may providecommunication for a number of wireless communication devices, each ofwhich may be serviced by a base station. A base station may be a devicethat communicates with wireless communication devices.

As wireless communication devices have advanced, improvements incommunication capacity, speed, flexibility and/or efficiency have beensought. However, improving communication capacity, speed, flexibility,and/or efficiency may present certain problems.

For example, wireless communication devices may communicate with one ormore devices using a communication structure. However, the communicationstructure used may only offer limited flexibility and/or efficiency. Asillustrated by this discussion, systems and methods that improvecommunication flexibility and/or efficiency may be beneficial.

SUMMARY OF INVENTION

In one example, a user equipment for performing sidelink (SL)communications is provided. The user equipment comprises receivingcircuitry, determining circuitry and transmitting circuitry. Thereceiving circuitry is configured to receive a radio resource control(RRC) message comprising first information used for configuring one ormore resource pools for at least one SL transmission within one or moreSL bandwidth parts (BWPs). The determining circuitry is configured toselect an SL resource for transmission of a Physical Sidelink ControlChannel (PSCCH) and a Physical Sidelink Shared Channel (PSSCH)associated with the PSCCH. The transmitting circuitry is configured totransmit first-stage SL control information (SCI) over the PSCCH and totransmit the PSSCH associated with the PSCCH, wherein second-stage SCIis carried on the PSSCH, and the first-stage SCI provides schedulinginformation of the PSSCH, and indicates a format of the second-stageSCI.

In one example, a communication method performed by a user equipment forperforming sidelink (SL) communications is provided. The communicationmethod comprises receiving a radio resource control (RRC) messagecomprising first information used for configuring one or more resourcepools for at least one SL transmission within one or more SL bandwidthparts BWPs); selecting an SL resource for transmission of a PhysicalSidelink Control Channel (PSCCH) and a Physical Sidelink Shared Channel(PSSCH) associated with the PSCCH; transmitting first-stage SL controlinformation (SCI) over the PSCCH; and transmitting the PSSCH associatedwith the PSCCH, wherein second-stage SCI is carried on the PSSCH, andthe first-stage SCI provides scheduling information of the PSSCH, andindicates a format of the second-stage SCI.

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 is a block diagram illustrating one implementation of one or morebase stations (gNBs) and one or more user equipments (UES) in whichconfigurations for Vehicle-to-Everything (V2X) communication may beimplemented.

FIG. 2 is an example illustrating V2X services.

FIG. 3 is a diagram illustrating one example of a resource grid for thedownlink.

FIG. 4 is a diagram illustrating one example of a resource grid far theuplink.

FIG. 5 shows examples of downlink (DL) and/or sidelink (SI) controlchannel monitoring regions.

FIG. 6 shows examples of a bandwidth part(s) (BWP(s)) and/or a resourcepool(s).

FIG. 7 shows examples of SL feedback control information (SFCI)transmission(s).

FIG. 8 is a block diagram illustrating one implementation of a UE.

FIG. 9 is a block diagram illustrating one implementation of a gNB.

FIG. 10 illustrates various components that may be utilized in a UE.

FIG. 11 illustrates various components that may be utilized in a gNB.

FIG. 12 is a block diagram illustrating one implementation of a UE inwhich configurations for V2X communication may be implemented.

FIG. 13 is a block diagram illustrating one implementation of a gNB inwhich configurations for V2X communication may be implemented.

FIG. 14 is a flow diagram illustrating a communication method of a UEthat performs an SL communication(s).

FIG. 15 is a flow diagram illustrating a communication method of a

DESCRIPTION OF EMBODIMENTS

A user equipment (UE) that performs a sidelink (SL) communication(s) isdescribed. The UE includes receiving circuitry configured to receive aradio resource control (RRC) message that includes first informationused for configuring one or more resource pools for SL transmission(s)within an SL bandwidth part (BWP). The receiving circuitry is alsoconfigured to receive an RRC message that includes second informationused for configuring a monitoring occasion(s) for a physical SL controlchannel (PSCCH). The information is used for configuring the monitoringoccasion(s) for the PSCCH being configured for each of the one or moreresource pools for the SL transmission(s). The receiving circuitry isalso configured to monitor the PSCCH based on the second information.The UE also includes transmitting circuity configured to perform SLcommunications) on a physical SL shared channel (PSSCH). The PSSCH isscheduled by using an SL control information (SCI) format on the PSSCH.

A base station apparatus (e.g., gNB) is also described. The gNB includestransmitting circuitry configured to transmit an RRC message thatincludes first information used for configuring one or more resourcepools for SL transmission(s) within an SL BWP. The transmittingcircuitry is also configured to transmit an RRC message that includessecond information used for configuring a monitoring occasion(s) for aPSCCH. The information is used for configuring the monitoringoccasion(s) for the PSCCH being configured for each of the one or moreresource pools for the SL transmission(s). The PSCCH is monitored basedon the second information. SL communication(s) is performed on a PSSCH.The PSSCH is scheduled by using an SCI format on the PSSCH.

A communication method of a UE that performs SE; communication(s) isalso described. The method includes receiving an RRC message thatincludes first information used for configuring one or more resourcepools for SL transmissions) within an SL BWP. The method also includesreceiving an RRC message that includes second information used forconfiguring a monitoring occasion(s) for a PSCCH. The information isused for configuring the monitoring occasion(s) for the PSCCH beingconfigured for each of the one or more resource pools for the SLtransmission(s). The method further includes monitoring the PSCCH basedon the second information. The method additionally includes performingSL communication(s) on a PSSCH. The PSSCH is scheduled by using an SCIformat on the PSSCH.

A communication method of a gNB is also described. The method includestransmitting an RRC message that includes first information used forconfiguring one or more resource pools for SL transmission(s) within anSL BWP. The method also includes transmitting an RRC message comprisingsecond information used for configuring a monitoring occasion(s) for aPSCCH. The information is used for configuring the monitoringoccasion(s) for the PSCCH being configured for each of the one or moreresource pools for the SL transmission(s). The PSCCH is monitored basedon the second information SL communication(s) is performed on a PSSCH.The PSSCH is scheduled by using an SL control information (SCI) formaton the PSSCH.

The 3rd Generation Partnership Project, also referred to as “3GPP.” is acollaboration agreement that aims to define globally applicabletechnical specifications and technical reports for third and fourthgeneration wireless communication systems. The 3GPP may definespecifications for next generation mobile networks, systems and devices.

3GPP Long Term Evolution (LTE) is the name given to a project to improvethe Universal Mobile Telecommunications System (UMTS) mobile phone ordevice standard to cope with future requirements. In one aspect, UMTShas been modified to provide support and specification for the EvolvedUniversal Terrestrial Radio Access (E-UTRA) and Evolved UniversalTerrestrial Radio Access Network (E-UTRAN).

A wireless communication device may be an electronic device used tocommunicate voice and/or data to a base station, which in turn maycommunicate with a network of devices (e.g., public switched telephonenetwork (PSTN), the Internet, etc.). In describing systems and methodsherein, a wireless communication device may alternatively be referred toas a mobile station, a UE, an access terminal, a subscriber station, amobile terminal, a remote station, a user terminal, a terminal, asubscriber unit, a mobile device, etc. Examples of wirelesscommunication devices include cellular phones, smart phones, personaldigital assistants (PDAs), laptop computers, netbooks, e-readers,wireless modems, etc. In 3GPP specifications, a wireless communicationdevice is typically referred to as a UE. However, as the scope of thepresent disclosure should not be limited to the 3GPP standards, theterms “UE” and “wireless communication device” may be usedinterchangeably herein to mean the more general term “wirelesscommunication device.” A UE may also be more generally referred to as aterminal device.

In 3GPP specifications, a base station is typically referred to as aNode B, au evolved Node B (eNB), a home enhanced or evolved Node B(HeNB) or some other similar terminology. As the scope of the disclosureshould not be limited to 3GPP standards, the terms “base station,” “NodeB,” “eNB,” “gNB” and/or “HeNB” may be used interchangeably herein tomean the more general term. “base station.” Furthermore, the term “basestation” may be used to denote an access point. An access point may bean electronic device that provides access to at network (e.g., LocalArea Network (LAN), the Internet, etc.) for wireless communicationdevices. The term “communication device.” may be used to denote both awireless communication device and/or base station. An eNB may also bemore generally referred to as a base station device.

Fifth generation (5G) cellular communications, (also referred to as “NewRadio,” “New Radio Access Technology” or “NR” by 3GPP) envisions the useof time, frequency, and/or space resources to allow for enhanced mobilebroadband (eMBB) communication and ultra-reliable low-latencycommunication (URLLC) services, such as eMBB (enhanced MobileBroad-Band), URLLC (Ultra Reliable and Low Latency Communication), mMTC(massive Machine Type Communication), and/or V2X (Vehicle-to-Everything)communication. For example, in V2X communication, wireless communicationdevices may communicate with one or more devices using communicationresources. A new radio (NR) base station may be referred to as a gNB. AgNB may also be more generally referred to as a base station device.

However, the communication resources used may only offer limitedflexibility and/or efficiency. As illustrated by this discussion,apparatus, systems and methods that improve communication flexibilityand/or efficiency may be beneficial.

Various examples of the systems and methods disclosed herein are nowdescribed with reference to the Figures, where like reference numbersmay indicate functionally similar elements. The systems and methods asgenerally described and illustrated in the Figures herein could bearranged and designed in a wide variety of different implementations.Thus, the following more detailed description of severalimplementations, as represented in the Figures, is not intended to limitscope, as claimed, but is merely representative of the systems andmethods.

FIG. 1 is a block diagram illustrating one implementation of one or morebase stations (e.g., gNBs) 160 and one or more user equipments (UEs) 102in which configurations for V2X communication may be implemented. Theone or more UEs 102 communicate with one or more gNBs 160 using one ormore antennas 122 a-n. For example, a UE 102 transmits electromagneticsignals to the gNB 160 and receives electromagnetic signals from the gNB160 using the one or more antennas 122 a-n. The gNB 160 communicateswith the UE 102 using one or more antennas 180 a-n.

The UE 102 and the gNB 160 may use one or more channels 119, 121 tocommunicate with each other. For example, a UE 102 may transmitinformation or data to the gNB 160 using one or more uplink channels121. Examples of uplink Channels 121 include a PUCCH (Physical UplinkControl Channel) and a PUSCH (Physical Uplink Shared Channel), a PRACH(Physical Random Access Channel), etc. For example, uplink channels 121(e.g., the PUSCH) may be used. for transmitting UL data (i.e., TB(s)(Transport Block(s)), MAC (Medium Access Control) PDU, and/or UL-SCH(Uplink-Shared Channel)).

Also, for example, uplink channels 121 may be used for transmittingHybrid Automatic Repeat. Request ACK (HARQ-ACK), Channel StateInformation (CSI), and/or a Scheduling Request (SR). The HARQ-ACK mayinclude information indicating a positive acknowledgment (ACK) and/or anegative acknowledgment (NACK) for DL data (i.e., TB(s), MAC PDU, and/orDL-SCH (Downlink-Shared Channel)).

The CSI may include information indicating a channel quality ofdownlink. The CSI may include one or more of a CQI (channel qualityindicator), a PMI (precoding matrix indicator), an RI (rank indicator),an LI (layer indicator), and/or a CRI (CSI-RS index). The SR may be usedfor requesting UL-SCH (Uplink-Shared Channel) resources for newtransmission and/or retransmission. Namely, the SR may be used forrequesting UL resources for transmitting UL data. Here, the HARQ-ACK,the CSI, and/or the SR may be included in UCI (Uplink ControlInformation).

The one or more gNBs 150 may also transmit information or data to theone or more UEs 102 using one or more downlink channels 119, forinstance. Examples of downlink channels 119 include a PDCCH (PhysicalDownlink Control Channel), a PDSCH (Physical Downlink Shared Channel),etc. Other kinds of channels may be used. The PDCCH may be used fortransmitting Downlink Control Information (DCI). The PDSCH may be usedfor transmitting the DL data.

Each of the one or more UEs 102 may include one or more transceivers118, one or more demodulators 114, one or more decoders 108, one or moreencoders 150, one or more modulators 154, a data buffer 104 and a UEoperations module 124. For example, one or more reception and ortransmission paths may be implemented in the UE 102. For convenience,only a single transceiver 118, decoder 108, demodulator 114, encoder 150and modulator 154 are illustrated in the LIE 102, though multipleparallel elements (e.g., transceivers 118, decoders 108, demodulators114, encoders 150 and modulators 154) may be implemented.

The transceiver 118 may include one or more receivers 120 and one ormore transmitters 158. The one or more receivers 120 may receive signalsfrom the gNB 160 using one or more antennas 122 a-n. For example, thereceiver 120 may receive and down-convert signals to produce one or morereceived signals 116. The one or more received signals 116 may beprovided to a demodulator 114. The one or more transmitters 158 maytransmit signals to the gNB 160 using one or more antennas 122 a-n. Forexample, the one or more transmitters 158 may upconvert and transmit oneor more modulated signals 156.

The demodulator 114 may demodulate the one or more received signals 116to produce one or more demodulated signals 112. The one or moredemodulated signals 112 may be provided to the decoder 108. The UE 102may use the decoder 108 to decode signals. The decoder 108 may producedecoded signals 110, which may include a UE-decoded signal 106 (alsoreferred to as a first UE-decoded signal 106). For example, the first.UE-decoded signal 106 may comprise received payload data, which may bestored in a data buffer 104. Another signal included in the decodedsignals 110 (also referred to as a second UE-decoded signal 110) maycomprise overhead data and/or control data. For example, the second UEdecoded signal 110 may provide data that may be used by the UEoperations module 124 to perform one or more operations.

In general, the UE operations module 124 may enable the UE 102 tocommunicate with the one or more gNBs 160. The UE operations module 124may include a UE scheduling module 126.

In LTE V2X, a basic set of requirements for V2X service is supported,which are considered sufficient for basic road safety service. An LIEV2X-enabled vehicle (e.g., a vehicle configured with a UE 102 thatsupports V2X applications) can directly exchange status information viaa PC5 interface. It should be noted that sidelink (SL) may define theprocedures for realizing a single-hop UE-UE communication, similar toUplink and Downlink, which define the procedures for a UE-base station(BS) and BS-UE access, respectively. Along the same lines, PC5 wasintroduced as the new direct UE interface, similar to the Uu (UE-BSand/or BS-UE) interface (i.e., uplink and/or downlink). Thus, the PC5interface is also known as sidelink (SL) at the physical layer such asposition, speed and heading, with other nearby vehicles, infrastructurenodes and/or pedestrians that are also enabled with LTE V2X.

New Radio (e.g., Rel-16 NR) provides higher throughput, lower latencyand higher reliability as compared to LTE, via a combination ofenchantments to protocol numerology, usage of higher frequency bands(e.g., millimeter (mm) Wave Frequencies) and a selection of wider subcarrier spacings (SCS) (e.g., 30 kHz, 60 kHz, 120 kHz, and/or 240 kHz,in addition to the 15 kHz used by LTE) to match the higher frequencybands, and a process for beam management (BM). New Radio (e.g., Rel-16NR) is expected to provide an enhanced V2X service (also referred to asNR V2X) that leverages the higher throughput, lower latency and higherreliability provided by NR data transport services.

In NR, there are roughly two large frequency ranges specified in 3GPP.One is below 6 GHz (also referred to as sub 6 GHz or FR1). The other isabove 6 GHz (also referred to as millimeter wave or FR2. Depending onthe frequency ranges, the maximum bandwidth and subcarrier spacingvaries. In FR1, the maximum bandwidth is 100 MHz and in the FR2 rangethe maximum bandwidth is 400 MHz. Some subcarrier spacing (e.g., 15 kHzand 30kHz) can be used only in FRI and some subcarrier spacing (e.g.,120 kHz and 240 kHz) can be used in FR2 only, and some subcarrierspacing (e.g., 60 kHz) can be used both in the FR1 and FR2 range.

For a radio link between a gNB 160 and a UE 102 (e.g., a first or asecond UE 102), at least, the following physical channels may be used(e.g., downlink is a transmission direction from the gNB 160 to the LE102, and uplink is a transmission direction from the UE 102 to the gNB160): a PBCH (Physical Broadcast Channel); a PDCCH; a PDSCH; a PUCCH;and/or a PUSCH.

The PBCH may be used for broadcasting essential system information.Also, the PBCH may be used for carrying an MIB (Master InformationBlock). Also, the PBCH may be used for carrying one or more SIB(s)(System Information Block(s)). The PDCCH may be used for transmittingthe DCI in the downlink. The PDSCH may be used for transmitting the DLdata. The PUCCH may be used for transmitting the UCI. The PUSCH may beused for transmitting the UL data and/or the UCI.

Also, the PDSCH may be used for transmitting RMSI (Remaining MinimumSystem Information), the SIB(s), and/or paging information. Also, thePDSCH and/or the PUSCH may be used for transmitting information of ahigher layer (e.g., a RRC (Radio Resource Control) layer, and/or a MAClayer). For example, the PDSCH (e.g., from the gNB 160 to the UE 102)and/or the PUSCH (e.g., from the UE 102 to the gNB 160) may be used fortransmitting an RRC message (an RRC signal). Also, the PDSCH (e.g., fromthe gNB 160 to the UE 102) and/or the PUSCH (e.g., from the UE 102 tothe gNB 160) may be used for transmitting a MAC control element (a MACCE). The RRC message and/or the MAC CE may also be referred to as ahigher layer signal. The RRC message may include the MIB, the SIB(s), acommon RRC message, and/or a dedicated RRC message.

Also, for the radio link between a gNB 160 and UE 102 (e.g., a first ora second UE 102), at least the following physical signals may be used: aPSS (Primary Synchronization Signal); an SSS (Secondary SynchronizationSignal); a CSI-RS (Channel State Information Reference Signal); and/or aDMRS (Demodulation Reference Signal).

The PSS and/or the SSS may be used for time and/or frequencysynchronization. Also, the PSS and/or the SSS may be used fordetermination and/or detection of a physical cell identity (PCID). ThePSS, the SSS, the PBCH, and/or the DMRS for the PBCH may be multiplexedas an SS/PBCH block, and one or more SS/PBCH blocks may be transmittedin the downlink. The CSI-RS may be used for measuring the CSI for thedownlink and transmitted in the downlink. The CSI-RS may be a non-zeropower CSI-RS for channel measurement and/or interference measurement.Also, the CSI-RS may be a zero-power (ZP) CSI-RS (ZP CSI-RS) forinterference measurement. The DMRS may be used for demodulation ofdownlink and/or uplink physical channels, and the DMRS may be definedfor each downlink and/or uplink physical channel.

Also, for SL communication(s) (i.e., SL transmission(s) and/or SLreception(s)), at least the following physical channels may be defined:a PSBCH (Physical SL Broadcast Channel); a PSCCH (Physical SL ControlChannel); a PSSCH (Physical SL Shared Channel); and/or a PSFCH (PhysicalSL Feedback Channel).

The PSBCH may be used for carrying information on au SL frame number,and so on. The PSCCH may be used for transmitting SCI (SL ControlInformation). The SCI may be used for scheduling of the PSSCH and/or thePSFCH. For example, the SCI (e.g., the SCI format(s)) may include afrequency and/or time domain resource (e.g., a resource pool(s),resource(s) within a resource pool(s)) assignment for the PSSCH. Also,the SCI (e.g., the SCI format(s)) may include modulation and codingschemes (MCS) for the PSSCH. Also, the SCI (e.g., the SCI format(s)) maybe used for indicating a resource for the PSFCH (e.g., a position(s) ofthe PSFCH). Here, as described below, more than one SCI format may bedefined for the SL communication(s).

The PSSCH may be used for transmitting SL data (i.e., TB(s), a MAC PDU,and/or an SL-SCH (Sidelink-Shared Channel)) and/or SFCI (SL FeedbackControl Information). The SL data may include V2X data. Also, the PSSCHmay be used for transmitting the higher layer signal (e.g., the RRCmessage and/or the MAC CE). The PSFCH may be used for transmitting theSFCI.

The SFCI may include a HARQ-ACID (e.g., HARQ-ACK for the PSSCH) and/orCSI (e.g., CSI for an SL (i.e., a channel between a transmitter UE-1 anda receiver UE-2, as described below)). The HARQ-ACK (e.g., the HARQ-ACKfor the PSSCH) may be described as SL HARQ-ACK (e.g., SL HARQ feedback).Also, the CSI (e.g., the CSI for the SL) may be described as SL CSI. TheSL CSI may include CQI, PMI, RI, RSRP (Reference Signal Received Power),RSRQ (Reference Signal Received Quality), path gain/pathloss, an SRI(SRS (Sounding Reference Signal) Resource Indicator), a CRI (CSI-RSResource Indicator), interference condition, and/or vehicle motion.

Also, for SL communication(s), the following physical signals may bedefined: a PSSS (Primary SL Synchronization Signal); an SSSS (SecondarySL Synchronization Signal); an SCSI-RS (SL Channel State InformationReference Signal); an SDMRS (SL Demodulation Reference Signal).

The PSSS and/or the SSSS may be used for time and/or frequencysynchronization. Also, the PSSS and/or the SSSS may be used fordetermination and/or detection of a synchronization source identity(ID). The PSSS, the SSSS, the PSBCH, and/or the DMRS for the PSBCH maybe multiplexed as an SSS/PSBCH block, and one or more SSS/PSBCH blocksmay be transmitted in the SL. The SCSI-RS may be used for measuring theCSI for the SL and transmitted in the SL. The SCSI-RS may be a non-zeropower SCSI-RS for channel measurement and/or interference measurement.Also, the SCSI-RS may be a zero-power SCSI-RS (ZP SCSI-RS) forinterference measurement. The SDMRS may be used for demodulation ofphysical channels, and the SDMRS may be defined for each SL physicalchannel.

Here, in this disclosure, unless other vise noted, the size of variousfields in the time domain is expressed in time unitsT_(c)=1/(Δf_(max)·N_(f)) where Δf_(max)=480·10³ Hz and N_(f)=4096. Theconstant κ=T_(s)/T_(c)=64, where T_(s)=1/(Δf_(ref)·N_(f,ref)),Δf_(ref)=15·10³ Hz and N_(f,ref)=2048.

Multiple Orthogonal Frequency Division Multiple Access (OFDM)numerologies (e.g., subcarrier spacings and/or cyclic prefixes) aresupported, as given by Table 1 where μ and the cyclic prefix for abandwidth part are obtained from the higher-layer parametersubcarrierSpacing and cyclic Prefix, respectively. Here, numerologiesmay be separately configured for DL BWP(s), UL BWP(s), and/or SL BWP(s).

TABLE 1 μ Δf = 2^(μ) · 15 [kHz] Cyclic prefix 0 15 Normal 1 30 Normal 260 Normal, Extended 3 120 Normal 4 240 Normal

For subcarrier spacing configuration μ, slots may be numbered n_(s)^(μ)∈{0, . . . , N_(slot) ^(subframe,μ)−1} in increasing order within asubframe and n_(s,f) ^(μ)∈{0, . . . , N_(slot) ^(frame,μ)−1} inincreasing order within a frame. There are N_(symb) ^(slot) consecutiveOFDM symbols in a slot, where N_(symb) ^(slot) depends on the cyclicprefix as given by Tables 2 and 3, respectively. The start of slot in asubframe is aligned in time with the start of OFDM symbol N_(s)^(μ)N_(symb) ^(slot) in the same subframe. Table 2 depicts the number ofOFDM symbols per slot, slots per frame, and slots per subframe fornormal cyclic prefix. Table 3 depicts the number of OFDM symbols perslot, slots per frame, aid slots per subframe for extended cyclicprefix.

TABLE 2 μ N_(symb) ^(slot) N_(slot) ^(frame, μ) N_(slot) ^(subframe, μ)0 14 10 1 1 14 20 2 2 14 40 4 3 14 80 8 4 14 160 16

TABLE 3 ^(μ) N_(symb) ^(slot) N_(slot) ^(frame, μ) N_(slot)^(subframe, μ) 2 12 40 4OFDM symbols in a slot can be classified as “downlink”, “flexible”,“uplink”, and/or “sidelink”. In a slot in a downlink frame, the UE 102may assume that downlink transmissions only occur in “downlink” or“flexible” symbols. In a slot in an uplink frame the UE 102 may onlytransmit in “uplink” or “flexible” symbols. In a slot in a sidelinkframe, the LIE 102 may perform sidelink communication (i.e.,transmission and/or reception) in “sidelink” symbols.

For each numerology and carrier, a resource grid of N_(grid,x)^(size,μ)N_(sc) ^(RB) subcarriers and N_(sym) ^(subframe,μ) OFDM symbolsmay be defined, starting at common resource block N_(grid) ^(start,μ)indicated by higher-layer signaling. There may be one set of resourcegrids per transmission direction (uplink, downlink, or sidelink) withthe subscript x set to DL, UL, and/or SL for downlink, uplink, and/orsidelink, respectively. When there is no risk for confusion, thesubscript x may be dropped. There may be one resource grid for a givenantenna port p, subcarrier spacing configuration μ, and transmissiondirection (downlink, uplink, and/or sidelink).

Each element in the resource grid for antenna port p and subcarrierspacing configuration μ is called a resource element and is uniquelyidentified by (k,l)_(p,μ) where k is the in the frequency domain and lrefers to the symbol position in the time domain relative to samereference point. Resource element (k,l)_(p,μ) corresponds to a physicalresource and the complex value a_(k,l) ^((p,μ)). When there is no riskfor confusion, or no particular antenna port or subcarrier spacing isspecified, the indices p and μ may be dropped, resulting in a_(k,l)^((p)) or a_(k,l).

Point A is also described herein. A resource block is defined as N_(sc)^(RB)=12 consecutive subcarriers in the frequency domain. The point Aserves as a common reference point for resource block grids and may beobtained from the following. offsetToPointA for a PCell downlinkrepresents the frequency offset between point A and the lowestsubcarrier of the lowest resource block overlapping with the SS/PBCHblock (and/or the SSS/PSBCH block) used by the UE for initial cellselection, expressed in units of resource blocks assuming 15 kHzsubcarrier spacing for FR1 and 60 kHz subcarrier spacing for FR2.absoluteFrequencyPointA for all other cases whereabsoluteFrequencyPointA represents the frequency-location of point Aexpressed as in ARFCN.

Common resource blocks are numbered from 0 and upwards in the frequencydomain for subcarrier spacing configuration μ. The center of subcarrier0 of common resource block 0 for subcarrier spacing configuration μ maycoincide with point A. The relation between the common resource blocknumber n_(CRB) ^(μ) in the frequency domain and resource elements (k,l)for subcarrier spacing configuration μ may be given by n_(CRB)^(μ)=k/N_(sc) ^(RB) where k is defined relative to point A such that k=0corresponds to the subcarrier centered around point A.

Physical resource blocks may be defined within a bandwidth part andnumbered from 0 to N_(BWP,i) ^(size)=1 where i is the number of thebandwidth part. The relation between the physical resource block n_(PRB)in bandwidth part i and the common resource block n_(CRB) is given byn_(CRB)=n_(PRB)+N_(BWP,i) ^(start) where N_(BWP,i) ^(size) is the commonresource block where bandwidth part starts relative to common resourceblock 0.

Virtual resource blocks may be defined within a bandwidth part andnumbered from 0 to N_(BWP,i) ^(size)−1. In this case, i is the number ofthe bandwidth part.

A bandwidth part is a subset of contiguous common resource blocks for agiven numerology μ_(i) in bandwidth part i on a given carrier. Thestarting position N_(BWP,i) ^(start, μ) and the number of resourceblocks N_(BWP,i) ^(size, μ) in a bandwidth part may fulfil N_(grid,x)^(start,μ)≤N_(BWP,i) ^(start,μ)<N_(grid,x) ^(start,μ)+N_(grid,x)^(size,μ) and N_(grid,x) ^(start,μ)<N_(BWP,i) ^(size,μ)+N_(BWP,i)^(start,μ)≤N_(grid,x) ^(start,μ)+N_(grid,x) ^(size,μ), respectively.

The UE operations module 124 may provide information 148 to the one ormore receivers 120. For example, the UE operations module 124 may informthe receiver(s) 120 when to receive retransmissions.

The UE operations module 124 may provide information 138 to thedemodulator 114. For example, the UE operations module 124 may informthe demodulator 114 of a modulation pattern anticipated fortransmissions from the gNB 160.

The UE operations module 124 may provide information 136 to the decoder108. For example, the UE operations module 124 may inform the decoder108 of an anticipated encoding for transmissions from the gNB 160.

The UE operations module 124 may provide information 142 to the encoder150. The information 142 may include data to be encoded and/orinstructions for encoding. For example, the UE operations module 124 mayinstruct the encoder 150 to encode transmission data 146 and/or otherinformation 142. The other information 142 may include PDSCH HARQ-ACKinformation.

The encoder 150 may encode transmission data 146 and/or otherinformation 142 provided by the UE operations module 124. For example,encoding the data 146 and/or other information 142 may involve errordetection and/or correction coding, mapping data to space, time and/orfrequency resources for transmission, multiplexing, etc. The encoder 150may provide encoded data 152 to the modulator 154.

The UE operations module 124 may provide information 144 to themodulator 154. For example, the UE operations module 124 may inform themodulator 154 of a modulation type (e.g., constellation mapping) to beused for transmissions to the gNB 160. The modulator 154 may modulatethe encoded data 152 to provide one or more modulated signals 156 to theone or more transmitters 158.

The LE operations module 124 may provide information 140 to the one ormore transmitters 158. This information 140 may include instructions forthe one or more transmitters 158. For example, the UE operations module124 may instruct the one or more transmitters 158 when to transmit asignal to the gNB 160. For instance, the one or more transmitters 158may transmit during a UL subframe. The one or more transmitters 158 mayupconvert and transmit the modulated signal(s) 156 to one or more gNBs160.

Each of the one or more gNBs 160 may include one or more transceivers176, one or more demodulators 172, one or more decoders 166, one or moreencoders 109, one or more modulators 113, a data buffer 162 and a gNBoperations module 182. For example, one or more reception and/ortransmission paths may be implemented in a gNB 160. For convenience,only a single transceiver 176, decoder 166, demodulator 172, encoder 109and modulator 113 are illustrated in the gNB 160, though multipleparallel elements (e.g., transceivers 176, decoders 166, demodulators172, encoders 109 and modulators 113) may be implemented.

The transceiver 176 may include one or more receivers 178 and one ormore transmitters 117. The one or more receivers 178 may receive signalsfrom the UE 102 using one or more antennas 180 a-n. For example, thereceiver 178 may receive and down-convert signals to produce one or morereceived signals 174. The one or more received signals 174 may beprovided to a demodulator 172. The one or more transmitters 117 maytransmit signals to the UE 102 using one or more antennas 180 a-n. Forexample, the one or more transmitters 117 may upconvert and transmit oneor more modulated signals 115.

The demodulator 172 may demodulate the one or more received signals 174to produce one or more demodulated signals 170. The one or moredemodulated signals 170 may be provided to the decoder 166. The gNB 160may use the decoder 166 to decode signals. The decoder 166 may produceone or more decoded signals 164, 168. For example, a first eNB-decodedsignal 164 may comprise received payload data, which may be stored in adata buffer 162. A second eNB-decoded signal 168 may comprise overheaddata and/or control data. For example, the second eNB-decoded signal 168may provide data PDSCH HARQ-ACK information) that may be used by the gNBoperations module 182 to perform one or more operations.

In general, the gNB operations module 182 may enable the gNB 160 tocommunicate with the one or more UEs 102. The gNB operations module 182may include a gNB scheduling module 194. The gNB scheduling module 194may perform operations for V2X communication as described herein.

The gNB operations module 182 may provide information 188 to thedemodulator 172. For example, the gNB operations module 182 may informthe demodulator 172 of a modulation pattern anticipated fortransmissions from the UE(s) 102.

The gNB operations module 182 may provide information 186 to the decoder166. For example, the gNB operations module 182 may inform the decoder166 of an anticipated encoding for transmissions from the UE(s) 102.

The gNB operations module 182 may provide information 101 to the encoder109. The information 101 may include data to be encoded and/orinstructions for encoding. For example, the gNB operations module 182may instinct the encoder 109 to encode information 101, includingtransmission data 105.

The encoder 109 may encode transmission data 105 and/or otherinformation included in the information 101 provided by the gNBoperations module 182. For example, encoding the data 105 and/or otherinformation included in the information 101 may involve error detectionand/or correction coding, mapping data to space, time and/or frequencyresources for transmission, multiplexing, etc. The encoder 109 mayprovide encoded data 111 to the modulator 113. The transmission data 105may include network data to be relayed to the UE 102.

The gNB operations module 182 may provide information 103 to themodulator 113. This information 103 may include instructions for themodulator 113. For example, the gNB operations module 182 may inform themodulator 113 of a modulation type (e.g., constellation mapping) to beused for transmissions to the UE(s) 102. The modulator 113 may modulatethe encoded data 111 to provide one or more modulated signals 115 to theone or more transmitters 117.

The gNB operations module 182 may provide information 192 to the one ormore transmitters 117. This information 192 may include instructions forthe one or more transmitters 117. For example, the gNB operations module182 may instruct the one or more transmitters 117 when to (or when notto) transmit a signal to the UE(s) 102. The one or more transmitters 117may upconvert and transmit the modulated signal(s) 115 to one or moreUEs 102.

It should be noted that a DL subframe may be transmitted from the gNB160 to one or more UEs 102 and that a UL subframe may be transmittedfrom one or more UEs 102 to the gNB 160. Furthermore, both the gNB 160and the one or more UEs 102 may transmit data in a standard specialsubframe.

It should also be noted that one or more of the elements or partsthereof included in the eNB(s) 160 and UE(s) 102 may be implemented inhardware. For example, one or more of these elements or parts thereofmay be implemented as a chip, circuitry or hardware components, etc. Itshould also be noted that one or more of the functions or methodsdescribed herein may be implemented in and/or performed using hardware.For example, one or more of the methods described herein may beimplemented in and/or realized using a chipset, an application-specificintegrated circuit (ASIC), a large-scale integrated circuit (LSI) orintegrated circuit, etc.

FIG. 2 is an example illustrating V2X services. A first UE 202 a(referred to as a UE 102 or a transmitter UE-1) transmits the V2X datato a second UE 202 b (referred to as a UE 102 or a receiver UE-2). Abase station (gNB) 260 transmits the UE data or control signal(s) to theUE 102 (i.e., the first UE 202 a and/or the second UE 202 b). L1 is aradio link between gNB 260 and the first UE 202 a (L1 may be called asUu interface). Also, L2 is a radio link between the first UE 202 a andthe second UE 202 b (L2 may be called as PC5 interface (i.e., the SL)).

For example, the transmitter UE-1 may perform PSBCH transmission to thereceiver UE-2. Also, the transmitter UE-1 may perform PSCCH transmissionto the receiver UE-2. Also, the transmitter UE-1 may perform PSSCHtransmission to the receiver 2. Also, the receiver UE-2 may performPSFCH transmission to the transmitter UE-1. Also, the transmitter UE-1and/or the receiver 2 may perform PSFCH transmission to the gNB 260.Also, the transmitter UE-1 may perform SSS/PSBCH block transmission tothe receiver UE-2. Also, the transmitter UE-1 may perform SCSI-RStransmission to the receiver UE-2. Also, the transmitter UE-1 mayperform SDMRS transmission associated with each SL physical channel tothe receiver UE-2.

FIG. 3 is a diagram illustrating one example, of a resource grid for thedownlink. The resource grid illustrated in FIG. 3 may be utilized insome implementations of the systems and methods disclosed herein. Moredetail regarding the resource grid is given in connection with FIG. 1.

In FIG. 3, one downlink subframe 369 may include two downlink slots 383.N^(DL RB) is a downlink bandwidth configuration of the serving cell,expressed in multiples of N^(RB) _(sc), where N^(RB) _(sc) is a resourceblock 389 size in the frequency domain expressed as a number ofsubcarriers, and N^(DL) _(symb) is the number of OFDM symbols 387 in adownlink slot 383. A resource block 389 may include a number of resourceelements (RE) 391.

For a Primary Cell (PCell), N^(DL) _(RB) is broadcast as a part ofsystem information. For an SCell (including an Licensed Assisted Access(LAA) SCell), N^(DL) _(RB) is configured by an RRC message dedicated toa UE 102. For PDSCH mapping, the available RE 391 may be the RE 391whose index l fulfils 1≥l_(data,start) and/or l_(data,end)≥1 in asubframe.

In the downlink, the OFDM access scheme with a cyclic prefix (CP) may beemployed, which may be also referred to as CP-OFDM. A downlink frame mayinclude multiple pairs of resource blocks (RBs) 389, which is alsoreferred to as physical resource blocks (PRBs). The RB pair is a unitfor assigning radio resources, defined by a predetermined bandwidth(i.e., the RB bandwidth) and a time slot. The RB pair may include twoRBs 389 that are continuous in. the time domain. Additionally oralternatively, the RB 389 may include twelve sub-carriers in thefrequency domain and seven (for normal CP) or six (for extended CP) OFDMsymbols in the time domain. A region defined by one sub-carrier in thefrequency domain and one OFDM symbol in the time domain may be referredto as a resource element (RE) 391 and may be uniquely identified by theindex pair (k,l), where k and l are indices in the frequency and timedomains, respectively. Here, the same structure as the downlink may beapplied for the SL communication(s).

FIG. 4 is a diagram illustrating one example of a resource grid for theuplink. The resource grid illustrated in FIG. 4 may be utilized in someimplementations of the systems and. methods disclosed herein. Moredetail regarding the resource grid is given in connection with FIG. 1.

In FIG. 4, one uplink subframe 469 may include two uplink Slots 483.N^(UL) _(RB) is an uplink bandwidth configuration of the serving cell,expressed in multiples of N^(RB) _(sc), where N^(RB) _(sc) is a resourceblock 489 size in the frequency domain expressed as a number ofsubcarriers, and N^(UL) _(symb) is the number of Single-CarrierFrequency Division Multiple Access (SC-FDMA) symbols 493 in an uplinkslot 483. A resource block 489 may include a number of resource elements(RE) 491.

For a PCell, N^(UL) _(RB) is broadcast as a part of system information.For an SCell (including an LAA N^(UL) _(RB) is configured by a RRCmessage dedicated to a UE 102.

In the uplink, addition to the CP-OFDM, a Single-Carrier FrequencyDivision Multiple Access (SC-FDMA) access scheme may be employed, whichis also referred to as. Discrete Fourier Transform-Spreading OFDM(DFT-S-OFDM), An uplink radio frame may include multiple pairs ofresource blocks 489. The RB pair is a unit for assigning radioresources, defined by a predetermined bandwidth (i.e., the RB bandwidth)in a time slot. The RB pair may include two RBs 489 that are continuousin the time domain. The RB 489 may include twelve sub-carriers in thefrequency domain and seven (for normal CP) or six (for extended CP)OFDM/DFT-S-OFDM symbols in the time domain. A region defined by onesub-carrier in the frequency domain and one OFDM/DFT-S-OFDM symbol inthe time domain may be referred to as a resource element (RE) 491 andmay be uniquely identified by the index pair (k,l) in a slot, where kand l are indices in the frequency and time domains, respectively. TheCP-OFDM may be defined as the case that transform precoding is notenabled and/or disabled. The DFT-S-OFDM may be defined as the case thattransform precoding is enabled. Here, the same structure as the uplinkmay be applied for the SL communication(s). Also, the SLcommunication(s) may be performed in an uplink band(s) (e.g., an uplinkfrequency band(s)).

FIG. 5 shows examples of downlink (DL) and/or sidelink (SL) controlchannel monitoring regions. The resource grid illustrated in FIG. 5 maybe utilized in some implementations of the systems and methods disclosedherein. A physical resource block (PRB) 591 may include 12 subcarriersin the frequency domain.

One or more sets 501 of PRB(s) 591 may be configured for DL and/or SLcontrol channel (i.e., PDCCH and/or PSCCH) monitoring. In other words, acontrol resource set is, in the frequency domain, a set 501 of PRBs 591within which the UE 102 attempts to blindly decode the DCI and/or theSCI, where the PRBs 591 may or may not be frequency contiguous, a UE 102may have one or more control resource sets, and one or more DCI messagesand/or one or more SCI messages may be located within one controlresource set.

As described above, the PDCCH may be used for transmitting the DCI usedfor scheduling of the PDSCH. Here, more than one DCI format may bedefined (e.g., configured by the gNB 160 to the UE 102) for DCItransmission on the PDCCH. Namely, fields may be defined in the DCIformat, and the fields are mapped to the information bits (e.g., DCIbits). For example, a DCI format 1_0 and/or a DCI format 1_1 used forscheduling of the PDSCH may be defined. Also, a DCI format 0_0 and/or aDCI format 0_1 used for scheduling the PUSCH may be defined. Forexample, the DCI formats (e.g., the DCI format 1_0 and/or 1_1, the DCIformat 0_0 and/or 0_1) may include frequency and/or time domain resourceassignment for the PDSCH or the PUSCH. Also, the DCI format 2_1 that maybe used for notifying the PRB(s) 591 and/or the OFDM symbol(s) where theUE 102 may assume no transmission in the DL and/or the UL is intendedfor the UE 102.

The gNB 160 may transmit, by using the RRC message, information used forconfiguring one or more RNTIs (Radio Network Temporary Identifier(s))for transmission of the DCI (e.g., the DCI format(s), the PDCCH(s)).Namely, CRC (Cyclic Redundancy Check) parity bits (also referred tosimply as CRC), which are generated based on the DCI, are attached tothe DCI, and, after attachment, the CRC parity bits are scrambled by theRNTI(s). The UE 102 may attempt to decode (e.g., monitor, detect) theDCI to which the CRC parity bits scrambled by the RNTI(s) are attached.Namely, the UE 102 may detect the PDCCH(s) (e.g., the DCI format(s))based on the blind decoding.

That is, the UE 102 may decode the PDCCH(s) with the CRC scrambled bythe RNTI(s). In other words, the UE 102 may monitor the PDCCH(s) withthe RNTI(s). Here, the UE 102 may detect the DCI format(s) in a USS(User equipment-specific Search Space) and/or a CSS (Common SearchSpace) Namely, the UE 102 may detect the DCI format(s) with the RNTI(s).

Here, the RNTI(s) for transmission of the DCI may include C-RNTI(Cell-RNTI), SI-RNTI (System Information RNTI), P-RNTI (Paging RNTI),and/or INT-RNTI (Interruption RNTI). For example, the C-RNTI may be aunique identification used for identifying an RRC connection and/orscheduling. Also, the SI-RNTI may be used for broadcasting of SI (i.e.,in the DL). Also, the P-RNTI may be used for transmission (i.e., in theDL) of paging and/or SI change notification. Also, the INT-RNTI may beused for interrupted transmission indication for the PDSCH and/or thePUSCH). For example, in a case that the UE 102 detects the DCI format2_1 with the CRC scrambled by the INT-RNTI, the UE 102 may assume notransmission to the UE 102 is present in PRBs 591 and/or in symbols inthe DL and/or the UL that are indicated by using the DCI format 2_1 withthe CRC scrambled by the INT-RNTI.

Also, the PSCCH may be used for transmitting the SCI used for schedulingof the PSSCH. Here, more than one SCI format may be defined (e.g.,configured by the gNB 160 to the UE 102, and/or configured by thetransmitter UE-1 to the receiver UE-2) for SCI transmission on thePSCCH. For example, more than one SCI format may be defined (e.g., used)for a particular SL communication mode (e.g., a mode 1, a mode 2, etc.).Namely, fields may be defined in the SCI format, and the fields aremapped to the information bits (e.g., SCI bits). For example, the SCIformat 0, the SCI format 1, the SCI format 2, the SCI format 3, the SCIformat 4 and/or the SCI format 5 may be defined as the SCI format(s).

For example, an SCI format 0 and/or an SCI format 1 used for schedulingof the PSSCH may be defined. For example, the SCI formats (e.g., the SCIformat 0 and/or 1) may include frequency and/or time domain resourceassignment for the PSSCH or the PSFCH. Namely, the SCI formats (e.g.,the SCI format 0 and/or 1) may be used for scheduling of the PSFCH(e.g., used for indicating resources of the PSFCH for HARQ-ACKtransmission for the PSSCH scheduled by the corresponding SCI format 0and/or SCI format 1). Also, an SCI format 2 used for indicating apresence of the SCSI-RS in the slots) and/or the symbols(s) may bedefined. Also, an SCI format 3 that may be used for requesting SL CSIreporting (e.g., aperiodic SL CSI reporting) may be defined. Also, anSCI format 4 that may be used for requesting transmission(s) of SCSI-RS(e.g., in the slot(s) and/or the symbols(s)) may be defined. Also, theSCI format 5 that may be used for notifying the PRB(s) 591 and/or theOFDM symbol(s) where the UE 102 may assume no transmission in the SL isintended for the UE 102 may be defined

Also, the SCI format(s) (e.g., the SCI format(s) 0, 1, 2, 3, 4, and/ormay include information used for indicating a resource pool(s) (e.g.,one or more indices of a resource pool(s) (e.g., resource pool-id)). Forexample, the information used for indicating the resource pool(s) mayinclude one or more indices of a Transmission (Tx) resource pool(s)(e.g., Tx resource pool-id) and/or one or more indices of a Reception(Rx) resource pool(s) (e.g., Rx resource pool-id). Namely, in thisdisclosure, the resource pool(s) may be a Tx resource pool(s) and/or Rxresource pool(s).

Also, the SCI format(s) (e.g., the SCI format(s) 0, 1, 2, 3, 4, and/or5) may include information used for indicating an SL bandwidth part(s)(e.g., one or more indices of an SL BWP(s) (e.g., bwp-id)). The UL 102may perform the SL communication(s) based on time information used forindicating time resource pool(s) and/or the information used forindicating time BWP(s). Here, as described below, one or more resourcepools may be configured in a single SL MVP.

Here, the Tx resource pool(s) may be defined (e.g., used) for the SLtransmission(s) (e.g., the V2X transmission(s)). Also, the Rx resourcepool(s) may be defined (e.g., used) for the SL reception(s) (e.g., theV2X reception(s)). For example, the gNB 160 may separately configure, byusing the RRC message, the Tx resource pools) and/or Rx resourcepool(s). And, for the SL communication(s), the UL 102 may select one Txresource pool (e.g., within one or more Tx resource pool(s)) and/or oneRx resource pool(s) (e.g., within one or more Rx resource pool(s)). Forexample, the UE 102 may select one Tx resource within the selected Txresource pool, and may perform the SL communication(s) on the selectedone Tx resource. Also, the UL 102 may select one Rx resource within theselected Rx resource pool, and may perform the SL communication(s) onthe selected one Rx resource. Here, the UE 102 may select one Txresource pool and/or one Rx resource pool within the same SL BWP (e.g.,the configured SL BWP).

Also, for the SL communication(s), the UE 102 may select one SL BWP. Theselected one SL BWP may be the configured SL BWP. For example, the UE102 may select one Tx resource pool and/or one Rx resource pool withinthe SL BWP. Namely, one or more Tx resource pool(s) and/or one or moreRx resource pool(s) may be configured within the same SL BWP.

For example, in a case that the resource pool(s) is indicated by usingthe SCI format(s) 0 and/or 1, the UE 102 may perform the SLcommunication(s) on the indicated resource pool(s). Also, in a case thatthe resource pool(s) is indicated by using the SCI format 2, the UT 102may assume that the SCSI-RS is present in the slot(s) and/or thesymbol(s) on the indicated resource pool(s). Also, in a case that theresource pools(s) is indicated by using the SCI format 3, the UE 102 mayperform SL CSI reporting on the indicated resource pool(s). Also, in acase that the resource pool(s) is indicated by using the SCI format 4,the UE 102 may consider that the transmission(s) of SCSI-RS is requestedon the indicated resource pool(s). The UE 102 may perform the SCSI-RStransmission(s) on the indicated resource pool(s). Also, in a case thatthe resource pool(s) is indicated by using the SCI format 5, the UE 102may assume no transmission on the indicated resource pools) is intendedfor the UE 102.

Also, in a case that the SL BWP(s) is indicated by using the SCIformat(s) 0 and/or 1, the UE 102 may perform the SL communication(s) onthe indicated SL BWP(s). Also, in a case that the SL. BWP(s) isindicated by using the SCI format 2, the UE 102 may assume that theSCSI-RS is present in the slot(s) and/or the symbol(s) on the indicatedSL MVP(s). Also, in a case that the resource pools(s) is indicated byusing the SCI format 3, the UE 102 may perform SL CSI reporting on theindicated SL BWP(s). Also, in a case that the resource pool(s) isindicated by using the SCI format 4, the UE 102 may consider that thetransmission(s) of SCSI-RS is requested on the indicated SL BWP(s). TheUE 102 may perform the SCSI-RS transmission on the indicated SL BWP(s).Also, in a case that the resource pool(s) is indicated by using the SCIformat 5 the UE 102 may assume no transmission on the indicated SLBWP(s) is intended for the UE 102.

Alternatively or additionally, the transmitter UE-1 may select oneresource pool for the SL communications), and may be indicated by usingthe information used for indicating the resource pool(s). Also, thetransmitter UE-1 may select one SL BWP for the SL communication(s), andmay be indicated by using the information used for indicating the SLBWP(s). Here, the gNB 106 may transmit to the UE 102 (e.g., thetransmitter UE-1 and/or the receiver UE 2), by using the RRC messageand/or the DCI format(s), information used for indicating the oneresource for the SL communication(s) (e.g., the selected one resourcepool).

For example, the transmitter UE-1 may select the resource pool (e.g., afirst resource pool) for the PSCCH transmission and/or the PSSCHtransmission, and may indicate the resource pool (e.g., the firstresource pool) by using the SCI format 0 and/or 1. And, based on thedetection of the SCI format 0, the receiver UE-2 may perform the PSCCHreception and/or the PSSCH reception on the indicated resource pool(e.g., the first resource pool). Also, the transmitter UE-1 may selectthe resource pool (e.g., a second resource pool) for the PSFCHreception, and may indicate the resource pool (e.g., the second resourcepool) by using the SCI format 0 and/or 1. And, based on the detection ofthe SCI format 0, the receiver UE-2 may perform the PSFCH transmissionon the indicated resource pool. Alternatively OF additionally, thereceiver UE-2 may perform the PSFCH transmission on the same resourcepool as the resource pool where the PSCCH reception and/or the PSSCHreception is performed. Namely, the same resource pool as the resourcepool indicated by the transmitter UE-1 for performing the PSCCHtransmission and/or the PSSCH transmission may be used for the PSFCHfeedback (e.g., HARQ-ACK feedback) for the corresponding PSSCHtransmission.

Also, the transmitter UE-1 may select the resource pool (e.g., a thirdresource pool) for the SCSI-RS transmission, and may indicate theresource pool (e.g., the third resource pool) by using the SCI format 2.And, based on the detection of the SCI format 2, the receiver UE-2 mayassume that the SCSI-RS is present in the slot(s) and/or the symbol(s)on the indicated resource pool (e.g., the third resource pool).

Also, the transmitter UE-1 may select the resource pool (e.g., a fourthresource pool) for requesting the SL CSI reporting, and may indicate theresource pool (e.g., the fourth resource pool) by using the SCI format3. And, based on the detection of the SCI format 3, the receiver UE-2may perform the SL CSI reporting on the indicated resource pool (e.g.,the fourth resource pool).

Also, the transmitter UE-1 may select the resource pool (e.g., a fifthresource pool) for requesting the SCSI-RS transmission(s), and mayindicate the resource pool (e.g., the fifth resource pool) by using timeSCI format 4. And, based on the detection of time SCI format 4, thereceiver UE-2 may recognize the SCSI-RS transmission is requested on theindicated resource pool (e.g., the fifth resource pool). The receiverUE-2 may perform the SCSI-RS transmission on the indicated resource pool(e.g., the first resource pool).

Also, the transmitter UE-1 may select the resource pool (e.g., a sixthresource pool) for notifying the PRB(s) and/or the OFDM symbol(s) wherethe receiver UE-2 may assume no transmission in the SL is intended forthe UE 102, and may indicate time resource pool (e.g., the sixthresource pool) by using the SCI format 5. And, based on the detection ofthe SCI format 5, the receiver UE-2 may assume no transmission on theindicated resource pool is intended for the UE 102.

The gNB 160 may transmit, by using the RRC message, information used forconfiguring one or more RNTIs (Radio Network Temporary Identifier(s))for transmission of the SCI (e.g., the SCI format(s), the PSCCH(s)).Namely, CRC (Cyclic Redundancy Check) parity bits (also referred tosimply as CRC), which are generated based on the SCI, may be attached tothe SCI, and, after attachment, the CRC parity bits are scrambled by theRNTI(s). The UE 102 may attempt to decode (e.g., monitor, detect) theSCI to which the CRC parity bits scrambled by the RNTI(s) are attached.Namely, the UP 102 may detect the PSCCH(s) (e.g., the SCI format(s))based on the blind decoding.

That is, the UE 102 may decode the PSCCH(s) with the CRC scrambled bythe RNTI(s). In other words, the UP 102 may monitor the PSCCH(s) withthe RNTI(s). Namely, the UP 102 may detect the SCI format(s) with theRNTI(s).

For example, the UL 102 may monitor a set of PSSCH candidates in one ormore control resource sets (CORESETs) (e.g., on one or more configuredSL BWPs, on one or more activated BWPs, on one or more configuredresource pools, on one or more activated resource pools, and/or on oneor more selected resource pools) according to corresponding search spaceset(s) (also referred as search space(s)). Here, the PSSCH monitoringmay be configured for the configured SL BWP, and/or the activated BWP.Alternatively or additionally, the PSSCH monitoring may be configuredper resource pool (e.g., within the configured SL BWP, and/or theactivated BWP). Here the “monitoring” implies decoding each PSCCHcandidate according to the monitored SCI formats.

The set of PSCCH candidates for the UP 102 to monitor may be defined interms of

PSCCH search space set(s). A search space set may be a CSS set and/or aUSS set. A UE 102 may monitor the PSCCH candidates in one or more of theCSS sets and/or the USS sets. Namely, the UP 102 may detect the SCIformats) in the CSS(s) and/or the USS(s).

For example, for the SL communication(s), the gNB 160 may transmit tothe LIE 102, by using the RRC message, information used for configuringthe CSS set. Also, for the SL communication(s), the gNB 160 may transmitto the UE 102, by using the RRC message, information used forconfiguring the USS set. Also, for the SL communication(s), thetransmitter UP-1 may transmit to the receiver UE-2 by using the RRCmessage, information used for configuring the CSS set. Also, for the SLcommunication(s), the transmitter UE-1 may transmit to the receiver UE-2by using the RRC message, information used for configuring the USS set.For example, based on the configuration of the CSS set(s) and the USSset(s) by the gNB 160, the transmitter UE-1 may transmit, to thereceiver UE-2, information used for configuring the CSS set and/or theUSS set (e.g., the same configuration(s) of the CSS set and/or the USSset as the configuration(s) configured by the gNB 160).

Here, the RNTI(s) for transmission of the SCI may include SL-RNTI,SL-V-RNTI (SL-V2X-RNTI), SCSI-RS-RNTI, SCSI-R-RNTI (SL CSIReporting-CNTI), R-SCSI-RS-RNTI (Request SCI-RS-RNTI), and/orSL-INT-RNTI (SL Interruption RNTI). For example, the SL-RNTI may be usedfor SL communication(s) scheduling. Also, the SL-V-RNTI may be used fordynamically scheduled SL transmission for V2X SL communication(s). Also,the SL-RNTI may be used for indicating a presence of the SCSI-RS in theslot(s) and/or the symbols(s). Also, the R-SCSI-RS-RNTI may be used forrequesting transmission(s) of the SCSI-RS (e.g., in the slot(s) and/orthe symbols(s)). Also, the INT-RNTI may be used for interruptedtransmission indication (e.g., for the PSSCH and/or the PSSCH). Forexample, the CRC parity bits that attached to the SCI format 0, 1, 2, 3,4, and/or 5 may be scrambled by the SL-RNTI, the SL-V-RNTI, theSCSI-RS-RNTI, the SCSI-R-RNTI, the R-SCSI-RS-RNTI, and/or theSL-INT-RNTI.

For example, in a case that the UE 102 detects the DCI format 2 with theCRC scrambled by the SCSI-RS-INTI, the UE 102 may recognize the presenceof the SCSI-RS in the slot(s) and/or the symbols(s) (e.g., foracquisition of SL CSI). Also, in a case that the UE 102 detects the DCIformat 3 with the CRC scrambled by the SCSI-R-RNTI, the UE 102 mayperform the SL CSI reporting (e.g., the aperiodic SL CSI reporting) onthe PSSCH and/or the PSFCH. Also, in a case that the UE 102 detects theDCI format 4 with the CRC scrambled by the R-SCSI-RS-RNTI, the UE 102may perform the SCSI-RS transmission (e.g., for acquisition of SL CSI).Also, in a case that the UE 102 detects the DCI format 5 with the CRCscrambled by the SL-INT-RNTI, the UE 102 may assume no transmission tothe UE 102 is present in the PRBs and/or in symbols in the SL that areindicated by using the DCI format 5 with the CRC scrambled by theSL-INT-RNTI. Here, the RNTI(s) may be used for identifying the SCIformat(s).

Here, the gNB 160 may transmit to the UE 102, by using the RRC message,information used for configuring (i.e., indicating) one or more CORESETswhere the UE 102 monitors the PSCCH (i.e., the PSCCH candidates). Also,the transmitter UE-1 may transmit to the receiver UE-2, by using the RRCmessage, information used for configuring one or more CORESETs where thereceiver UE-2 monitors the PSCCH (i.e., the PSCCH candidates). Forexample, based on the configuration of the CORESET(s) by the gNB 160,the transmitter UE-1 may transmit, to the receiver UE-2, informationused for configuring the CORESET(s) (e.g., the same configuration(s) ofthe CORESET(s) as the configuration(s) configured by the gNB 160).

For example, as the configuration(s) of the CORESET s), an index of theCORESET, a number of consecutive symbol(s), and/or a set of resourceblock(s) may be configured for each CORESET.

Here, the information used for configuring the CORESET(s) may beconfigured per resource pool (e.g., the Tx resource pool and/or Rxresource pool). Namely, the information used for configuring theCORESET(s) may be configured for each of the resource pools (e.g.,within the SL bandwidth part (BWP)). For example, the information usedfor configuring the CORESET(s) may be configured associated with anindex of the resource pool. Namely, the information used for configuringthe CORESET(s) may be associated with the index of the resource pool(e.g., the Tx resource pool and/or Rx resource pool).

Alternatively or additionally, the information used for configuring theCORESET(s) may be configured per SL MVP. Namely, the information usedfor configuring the CORESET(s) may be configured for each of the SLBWPs. For example, the information used for configuring the CORESET(s)may be configured associated with an index of the SL BWP bwp-Id)).Namely, the information used for configuring the CORESET(s) may beassociated with the index of the SL MVP. Here, as described below, theindex of the SL BWP may be linked to (e.g., paired with) an index of theDL BWP and/or an index of the UL BWP.

Alternatively or additionally, the information used for configuring theCORESET(s) may be configured per serving cell (or carrier). Namely, theinformation used for configuring the CORESET(s) may be configured foreach of the serving cells (or carriers). For example, the informationused for configuring the CORESET(s) may be configured associated with anindex of the serving cell (or an index of the carrier). Namely, theinformation used for configuring the CORESET(s) may be associated withthe index of the serving cell (or the index of the carrier). Here, thecarrier may correspond to a frequency band (e.g., a frequency range).

Alternatively or additionally, the information used for configuring theCORESET(s) may be configured per SCI format. Namely, the informationused for configuring the CORESET(s) may be configured for each of theSCI formats.

Alternatively or additionally, the information used for configuring theCORESET(s) may be configured per search space set. Namely, theinformation used for configuring the CORESET(s) may be configured foreach of the search space sets.

Alternatively or additionally, the configuration(s) of the CORESET(s)may be configured per resource pool (e.g., the Tx resource pool and/orRx resource pool). Namely, the configuration(s) of the CORESET(s) may beconfigured for each of the resource pools (e.g., within the SL BWP). Forexample, the configuration(s) of the CORESET(s) may be configuredassociated with an index of the resource pool. Namely, theconfiguration(s) of the CORESET(s) may be associated with the index ofthe resource pool (e.g., the Tx resource pool and/or Rx resource pool)

Alternatively or additionally, the configuration(s) of the CORESET(s)may be configured per SL MVP. Namely, the configuration(s) of theCORESET(s) may be configured for each of the SL BWPs. For example, theconfiguration(s) of the CORESET(s) may be configured associated with anindex of the SL BWP. Namely, the configuration(s) of the CORESET(s) maybe associated with the index of the SL BWP. Here, as described below theindex of the SL BWP may be linked to (e.g., paired with) an index of theDL BWP and/or an index of the UL BWP.

Alternatively or additionally, the configuration(s) of the CORESET(s)may be configured per serving cell (or carrier). Namely, theconfiguration(s) of the CORESET(s) may be configured for each of theserving cells tor carriers). For example, the configuration(s) of theCORESET(s) may be configured associated with an index of the servingcell (or an index of the carrier). Namely, the configuration(s) of theCORESET(s) may be associated with the index of the serving cell (or theindex of the carrier).

Alternatively or additionally, the configuration(s) of the CORESET(s)may be configured per SCI format, Namely, the configuration(s) of theCORESET(s) may be configured for each of the SCI formats. Alternativelyor additionally, the configuration(s) of the CORESET(s) may beconfigured per search space set. Namely, the configuration(s) of theCORESET(s) may be configured for each of the search space sets.

Also, the gNB 160 may transmit to the UE 102, by using the RRC message,information used for configuring (i.e., indicating) one or more searchspace sets where the UE 102 monitors the PSCCH (i.e., the PSCCHcandidates). Also, the transmitter UE-1 may transmit to the receiverUE-2, by using the RRC message, information used for configuring one ormore search space sets where the receiver UE-2 monitors the PSCCH (i.e.,the PSCCH candidates). For example, based on the configuration of thesearch space set(s) by the gNB 160, the transmitter UE-1 may transmit,to the receiver UE-2, information used for configuring the search spaceset(s) (e.g., the same configuration(s) of the search space set(s) asthe configuration(s) configured by the gNB 160).

For example, as the configuration(s) of the search space set(s), anindex of the search space set, an association between the search spaceset and the CORESET, a PSCCH monitoring periodicity (e.g., a periodicityof the slot(s) and/or an offset of the slot(s)), a PSCCH monitoringpattern within the slot(s) (e.g., symbol(s) within the slot(s) for PSCCHmonitoring), and/or an indication that search space set is either theCSS or the USS may be configured for each of the search space sets(i.e., per search space set). Here, the UE 102 may determine a PSCCHmonitoring occasions) based on the PSCCH monitoring periodicity and/orthe PSCCH monitoring patter within the slot(s).

Alternatively or additionally, as the configuration(s) of the searchspace set(s), the SCI format(s) and/or the RNTI(s) (i.e., the RNTI(s)for transmission of the SCI) where the UE 102 monitors the PSCCH (i.e.,the PSCCH candidates) may be configured for each of the search spacesets (i.e., per search space set). Namely, a parameter(s) to monitor thePSCCH (i.e., the PSCCH candidates) for the SCI format(s) with the CRCscrambled by the RNTI(s) may be configured for each of the search spacesets (per search space set). Here, the SCI format(s) may be one or more(e.g., any combination) of the SCI format(s) 0, 1, 2, 3, 4, and/or 5, asdescribed above. Also, the RNTI(s) may be one or more (e.g., anycombination) of the SL-RNTI the SL-V- Radio Network Temporary Identifier(RNTI), the SCSI-RS-RNTI, the SCSI-R-RNTI, the R-SCSI-RS-RNTI, and/orthe SL-INT-RNTI.

For example, for each of search space sets (i.e., per search space set),the UE 102 may be configured to monitor the PSCCH for the SCI formats 0and 1 with CRC scrambled by the SL-RNTI and the SL-V-RNTI. Also, foreach of search space sets (i.e., per search space set), the UE 102 maybe configured to monitor the PSCCH for the SCI formats 3 with the CRCscrambled by the SCSI-RS-RNTI. Also, for each of search space sets(i.e., per search space set), the UE 102 may be configured to monitorthe PSCCH for the SCI formats 4 with CRC scrambled by the SCSI-R-RNTI.Also, for each of search space sets (i.e., per search space set), the UE102 may be configured to monitor the PSCCH for the SCI formats 5 withCRC scrambled by the SL-INT-RNTI.

Here, the information used for configuring the search space set(s) maybe configured per resource pool (e.g., the Tx resource pool and or Rxresource pool). Namely, the information used for configuring the searchspace set(s) may be configured for each of resource pools (e.g., withinthe SL BWP). For example, the information used for configuring thesearch space set(s) may be configured associated with an index of theresource pool. Namely, the information used for configuring the searchspace set(s) may be associated with the index of the resource pool (theTx resource pool and/or Rx resource pool).

Alternatively or additionally, the information used fore configuring thesearch space set(s) may be configured per SL BWP. Namely, theinformation used for configuring the search space set(s) may beconfigured for each of the SL BWPs. For example, the information usedfor configuring the search space set(s) may be configured associatedwith an index of the SL BWP. Namely, the information used forconfiguring the search space set(s) may be associated with the index ofthe SL BWP Here, as described below, the index of the SL BWP may belinked to (e.g., paired with) an index of the DL BWP and/or an index ofthe UL BWP.

Alternatively or additionally, the information used for configuring thesearch space set(s) may be configured per serving cell (or carrier).Namely, the information used for configuring the search space sets) maybe configured for each of the serving cells (or carriers). For example,the information used for configuring the search space set(s) may beconfigured associated with an index of the serving cell (or an index ofthe carrier). Namely, the information used for configuring the searchspace set(s) may be associated with the index of the serving cell (orthe index of the carrier).

Alternatively or additionally, the information used for configuring thesearch space set(s) may be configured per SCI format. Namely, theinformation used for configuring the search space set(s) may beconfigured for each of the SCI formats.

Alternatively or additionally, the configuration(s) of the search spaceset(s) may be configured per resource pool (e.g., the Tx resource pooland or Rx resource pool). Namely, the configuration(s) of the searchspace set(s) may be configured for each of resource pools (e.g., withinthe SL BWP). For example, the configuration(s) of the search spaceset(s) may be configured associated with an index of the resource pool.Namely, the configuration(s) of the search space set(s) may beassociated with the index of the resource pool (e.g., the Tx resourcepool and/or Rx resource pool).

Alternatively or additionally, the configuration(s) of the search spaceset(s) may be configured per SL BWP. Namely, the configuration(s) of thesearch space set(s) may be configured for each of the SL BWPs. Forexample, the configuration(s) of the search space set(s) may beconfigured associated with an index of the SL BWP. Namely, theconfiguration(s) of the search space set(s) may be associated with theindex of the SL BWP. Here, as described below, the index of the SL BWPmay be linked to paired with) an index of the DL BWP and/or an index ofthe UL BWP.

Alternatively or additionally, the configuration(s) of the search spaceset(s) may be configured per serving cell (or carrier). Namely, theconfiguration(s) of the search space set(s) may be configured for eachof the serving cells (or carriers).

Alternatively or additionally, the configuration(s) of the search spaceset(s) may be configured per SCI format. Namely, the configuration(s) ofthe search space setts) may be configured for each of the SCI formats.For example, the configuration(s) of the search space set(s) inlay beconfigured associated with an index of the serving cell (or an index ofthe carrier). Namely, the configuration(s) of the search space set(s)may be associated with the index of the serving cell (or the index ofthe carrier).

The UE 102 may monitor the PSCCH (i.e., the PSCCH candidates) based onthe information and/or the configuration of the gNB 160. Also, thereceiver UE-2 may monitor the PSCCH (i.e., the PSCCH candidates) basedon the information and/or the configuration of the transmitter UE-1.

Here, the UE 102 may detect the PSCCH(s) (i.e. the SCI format(s)) basedon the decoding of the PSCCH(s) (i.e., the SCI format(s)). Namely, theSCI format(s) (e.g., the SCI format 6) that is used for scheduling ofthe PSCCH(s) may be defined. Here, the SCI formats) (e.g., the SCIformat 6) may be referred as a first-stage SCI format(s) and/or afirst-step SCI format(s). Also, the SCI formats) (e.g., the SCI formats0, 1, 2, 3, 4, and/or 5) may be referred as a second-stage SCI format(s)and/or a second-step SCI format(s). Namely, based on the decoding of thePSCCH (i.e., the first-stage SCI format(s)), the LIE 102 may identify aresource(s) of the PSSCH(s) (e.g., a position(s) of the PSCCH(s)) forthe PSSCH (i.e., for the second-stage SCI format(s)). Also, based on thedecoding of the PSCCH (i.e., the first-stage SCI format(s)), the UE 102may identify a format(s) for the PSSCH (i.e., for the second-stage SCIformat(s)).

Here, the gNB 160 may transmit to the LIE 102, by using the RRC message,information used for configuring a resource(s) of the PSSCH(s) aposition(s) of the PSCCH(s)) for the PSSCH(s) (i.e., for the first-stageSCI format(s)). Also, the gNB 160 may transmit to the UE 102, by usingthe RRC message, information used for configuring a format(s) for thePSSCH(s) (i.e., for the first-stage SCI format(s)). Also, thetransmitter UE-1 may transmit to the receiver UE-2, by using the RRCmessage, information used for configuring a resource(s) of the PSSCH(s)for the PSSCH(s) (i.e., for the first-stage SCI format(s)). Also, thetransmitter UE-1 may transmit to the receiver UE-2. by using the RRCmessage, information used for configuring a format(s) for the PSSCH(s)(i.e., for the first-stage SCI format(s)). For example, based on theconfiguration(s) of the PSSCH(s) (i.e., for the first-stage SCIformat(s)) by the gNB 160, the transmitter UE-1 may transmit, to thereceiver UE-2, information used for configuring the PSSCH(s) (i.e., forthe first-stage SCI format(s)) (e.g., the same configuration(s) of thePSSCH(s) as the configuration(s) configured by the gNB 160).

Here, the information used the resource(s) of the PSSCH(s) (i.e., forthe first-stage SCI format(s)) and/or the information used forconfiguring a format(s) for the PSSCH (i.e., for the first-stage SCIformat(s)) may be referred as first information.

Here, the first information may be configured per resource pool (e.g.,the Tx resource pool and/or Rx resource pool). Namely, the firstinformation may be configured for each of the resource pools (e.g.,within the SL BWP). For example, the first information may be configuredassociated with an index of the resource pool. Namely, the informationused for configuring the search space set(s) may be associated with theindex of the resource pool (e.g., the Tx resource pool and/or Rxresource pool).

Alternatively or additionally, the first information may be configuredper SL BWP. Namely, the first information may be configured for each ofthe SL BWPs. For example, the first information may be configuredassociated with an index of the SL. BWP. Namely, the first informationmay be associated with the index of the SL BWP. Here, as describedbelow, the index of the SL BWP may be linked to (e.g., paired with) anindex of the DL BWP and/or an index of the UL BWP.

Alternatively or additionally, the first information may be configuredper serving cell (or carrier). Namely, the first information may beconfigured for each of the serving cells (or carriers). For example, thefirst information may be configured associated with an index of theserving cell (or an index of the carrier). Namely, the first informationmay be associated with the index of the serving cell (or the index ofthe carrier).

Alternatively or additionally, the first information may be(pre-)configured for one resource pool. Namely, the UE 102 may decodethe PSSCH(s) i.e., the first-stage SCI format(s)) on only one resourcepool. The gNB 160 may transmit to the LTE 102, by using the RRC message,information used for configuring one resource pool where the UE 102decodes the PSCCH (i.e., the first-stage SCI format(s)). Also, thetransmitter UE-1 may transmit to the receiver UE-2, by using the RRCmessage, information used for configuring one resource pool where thereceiver UE-2 decodes the PSCCH (i.e., the first-stage SCI format(s)).

Alternatively or additionally, the first information may be(pre-)configured for one SL BWP (e.g., the configured SL BWP, theactivated SL BWP). Namely, the UE 102 may decode the PSSCH(s) (i.e., thefirst-stage SCI format(s)) on only one SL BWP. As described below, thegNB 160 may transmit to the UE 102, by using the RRC message,information used for configuring one SL BWP where the UE 102 decodes thePSCCH (i.e., the first-stage SCI format(s)). Also, the transmitter UE-1may transmit to the receiver UE 2, by using the RRC message, informationused for configuring one SL BWP where the receiver UE-2 decodes thePSCCH (i.e., the first-stage SCI format(s)).

Alternatively or additionally, the first information may be(pre-)configured for one serving cell (or one carrier) Namely, the UE102 may decode the PSSCH(s) (i.e., the first-stage SCI format(s)) ononly one serving cell (or only one carrier). The gNB 160 may transmit tothe UE 102, by using the RRC message, information used for configuringone serving cell (or one carrier) where the UE 102 decodes the PSCCH(i.e., the first-stage SCI format(s)). Also, the transmitter UE-1 maytransmit to the receiver UE-2, by using the RRC message, informationused for configuring one serving cell (or carrier) where the receiverUE-2 decodes the PSCCH (i.e., the first-stage SCI format(s)). Theserving cell where the UE 102 decode the PSSCH (i.e., the first-stageSCI format) may be a primary cell.

Namely, based on the reception of the first information, the UE 102 maydecode (e.g., receive) the PSSCH(s) (i.e., the first-stage SCIformat(s)). Namely, the UE 102 may monitor (i.e., blind decode) or maynot monitor (i.e., blind decode) the PSSCH (i.e., for the first stageSCI format(s)). The UE 102 may monitor only the PSCCH(s) (i.e., for thesecond-stage SCI format(s)) based on the information and/or theconfiguration(s).

For example, the SCI format 6 may include frequency domain assignmentfor the PSCCH (i.e., for the second-stage SCI format(s)). Also, the SCIformat 6 may include time domain assignment for the PSCCH (i.e., for thesecond-stage SCI format(s)). Also, the SCI format may include anindication used for indicating the SCI format(s) (i.e., the second-stageSCI format(s)).

Also, the SCI format 6 may include the information used for configuringthe CORESET(s). Also, the SCI format 6 may include the configuration(s)of the CORESET(s). Also, the SCI format 6 may include the informationused for configuring the search space set(s). Also, the SCI format 5 mayinclude the configuration(s) of the search space set(s). Here, theinformation and/or the configuration(s) included in the SCI format 6 maybe referred as an indication of the second-stage SCI format(s).

Also, the SCI format 6 may include the information used for indicatingthe resource pool(s) (e.g., the one or more indices of the resourcepool(s) (e.g., resource pool-id (i.e., Tx resource pool-id and/or Rxresource pool-id)). Also, the SCI format 6 may include the informationused for indicating the SL BWP(s) (e.g., the one or more indices of theSL BWP(s) (e.g., BWP-id)). Namely, the UE 102 may monitor the PSCCH(s)(e.g., the second-stage SCI format(s)) based on the information used forindicating the resource pool(s) and/or the information used forindicating the SL BWP(s).

For example, in a case that the resource pool(s) is indicated by usingthe SCI format 6, the UE 102 may monitor the PSCCH(s) (e.g., thesecond-stage SCI format(s)) on the indicated resource pool(s). The UE102 may monitor, based on the indication for the second-stage SCIformat(s), the PSCCH (e.g., the second-stage SCI format(s)) on theindicated resource pool(s). Also, in a case that the SL BWP(s) isindicated by using the SCI format 6, the UL 102 may monitor the PSCCH(s)(e.g., the second-stage SCI format(s)) on the indicated SL BWP(s). TheUP 102 may monitor, based on the indication for the second-stage SCIformat(s), the PSCCH (e.g., the second-stage SCI formats) on theindicated SL BWP(s).

Alternatively or additionally, the transmitter UE-1 may select theresource pool (e.g., a seventh resource pool) for monitoring thePSSCH(s) (e.g., the second-stage SCI format(s)), and may indicate theresource pool (e.g., the seventh resource pool) by using the SCI format6. And, based on the detection of the SCI format 6, the receiver UE-2may monitor the PSSCH (e.g., the second-stage SCI format(s)). Here, thegNB 106 may transmit to the UP 102 (e.g., the transmitter UE-1 and/orthe receiver UE-2), by using the RRC message and/or the DCI format(s),information used for indicating the one resource for the SLcommunication(s).

Namely, the indication for the second-stage SCI format(s) may beindicated per resource pool and/or per SL BWP. The indication for thesecond-stage SCI format(s) may be indicated for each of resource pools(e.g., within the single SL BWP) and/or each of the SL BWPs. Namely, theindication for the second-stage SCI format(s) may be associated with theindex of the resource pool(s). Also, the indication for the second-stageSCI format(s) may be associated with the index of the SL BWP(s).

Here, the SCI format 6 may include the index of the serving cell (or theindex of the carrier). Namely, the indication for the second-stage SCIformat(s) may be indicated per serving cell (or carrier) The indicationfor the second-stage SCI format(s) may be indicated for each of theserving cells (or carriers). Namely, the indication for the second-stageSCI formats) may be indicated associated with the index of the servingcell (or the index of the carrier). The indication for the second-stageSCI format(s) may be associated with the index of the serving cell (orthe index of the carrier).

As described above, the information (i.e., the information associatedwith the PSCCH) and/or the configuration (i.e., the configuration(s)associated with the PSCCH) may be configured by using the RRC message.Also, the information (i.e., the information associated with the PSCCH)and/or the configuration(s) (i.e., the configuration(s) associated withthe PSCCH) may be indicated by using the SCI format 6. Here, a part ofthe information and/or a part of the configuration(s) may be configuredby using the RRC message, and a part of the information and/or a part ofthe configuration(s) may be indicated by using the SCI format 6. Namely,the combination of use of the RRC message and use of the SCI format 6 isnot excluded.

FIG. 6 shows examples of a bandwidth part(s) (BWP(s)) and/or a resourcepool(s) 603. In FIG. 6, as one example, a single sidelink (SL) BWP 601is configured, four resource pools 603 are configured within the singleSL BWP 601. A first UE 602 a (referred to as a UE 602 or a transmitterUE-1) transmits data to a second UE 602 b (referred to as a UE 602 or areceiver UE-2).

Here, for serving cell(s), the gNB 660 may transmit to the UE 602, byusing the RRC message, information used for configuring DL bandwidthpart(s) (i.e., DL BWP(s)). For example, the gNB 650 may configure a setof DL BWPs (e.g., at most four DL BWPs, a DL BWP set) in a serving cell(e.g., for receptions by the UE 602). Also, as a configuration(s) forthe DL BWP, for each DL BWP the gNB 660 may configure, by using the RRCmessage, the subcarrier spacing, the cyclic prefix, a number ofcontiguous PRBs (e.g., a bandwidth of PRBs), and/or the index of DL BWP(e.g., bwp-Id). Here, a single DL BWP may be activated at a given time.Namely, an activation and/or a. deactivation may be supported for the DLBWP(s). For example, the UE 602 may perform, based on theconfiguration(s), the PDCCH reception, the PDSCH reception, and/or theCSI-RS reception on the activated DL BWP.

Also, for serving cell(s), the gNB 660 may transmit to the UE 602, byusing the RRC message, information used for configuring the UL bandwidthpart(s) (i.e., UL BWP(s)). For example, the gNB 660 may configure a setof UL BWPs (e.g., at most four UL BWPs, a UL BWP set) in a serving cell(e.g., for transmissions by the UE 602). Also, as a configuration(s) forthe UL BWP, for each LTL BWP, the gNB 650 may configure, by using theRRC message, the subcarrier spacing, the cyclic prefix, a number ofcontiguous PRBs (e.g., a bandwidth of PRBs), and/or the index of UL BWP(e.g., bwp-Id). Here, a single UL BWP set may be activated at a giventime. Namely, an activation and/or a deactivation may be supported forthe UL BWP(s). For example, the UE 602 may perform, based on theconfiguration(s), the PUSCH transmission, and/or the PUCCH transmissionon the activated UL BWP.

Here, in a carrier aggregation (CA), the gNB 660 and the UE 602 maycommunicate each other using one or more serving cells. The one or moreserving cell may include one primary cell and one or more secondarycells. For example, the gNB 660 may transmit to the UE 602. by using theRRC message, information used for configuring the primary cell. Also,the gNB 660 may transmit to the UE 602, by using the RRC message,information used for configuring, one or more secondary cells to formwith the primary cell a set of serving cells.

Also, the gNB 660 may transmit to the UE 602, by using the RRC message,information used for configuring SL the bandwidth part(s) 601 (i.e., SLBWP 601). For example, the gNB 660 may configure to the UE 602 only oneSL BWP 601 in the SL. Alternatively or additionally, the gNB 660 mayconfigure to the UE 602 a set of UL BWPs (e.g., at most two UL BWPs, anSL BWP set) in the SL (e.g., for the SL communications(s) by thetransmitter UE-1 and the receiver UE-2). Also, as a configuration(s) forthe SL BWP 601, for each SL BWP 601, the gNB 660 may configure, by usingthe RRC message, the subcarrier spacing, the cyclic prefix, a number ofcontiguous PRBs (e.g., a bandwidth of PRBs), and/or the index of SL BWP601 (e.g., bwp-Id).

Also, the transmitter UE-1 may transmit to the receiver UE-2, by usingthe RRC message, information used for configuring SL BWP 601. Forexample, the transmitter UE-1 may configure to the receiver UE-2 onlyone SL BWP 601 in the SL. Alternatively or additionally, the transmitterUE-1 may configure to the receiver UE-2 a set of UL BWPs (e.g., at mosttwo DL BWPs, an SL BWP set) in the SL (e.g., for the SLcommunications(s) by the transmitter UE-1 and the receiver UE-2). Also,as the configuration(s) of the SL BWP 601, for each SL BWP 601, thetransmitter UE-1 may configure to the receiver UE-2, by using the RRCmessage, the subcarrier spacing, the cyclic prefix, a number ofcontiguous PRBs (e.g., a bandwidth of PRBs), and/or the index of SL BWP601 (e.g., bwp-Id). For example, based on the configuration of the SLBWP 601 by the gNB 660, the transmitter UE-1 may transmit, to thereceiver UE-2, one or more information used for configuring the SL BWP601 (e.g., the same configuration(s) of the SL BWP 601 as theconfiguration(s) configured by the gNB 660).

Here, the single SL BWP 601 may be activated at a given time. Forexample, the configured SL BWP 601 may be always considered as beingactivated. The transmitter UE-1 and the receiver UE-2 may perform, basedon the configuration(s), the SL communication(s) on the activated SL BWP601. Namely, the same SL BWP 601 may be used for the SLcommunication(s).

For example, based on the configuration(s) of the SL BWP 601 for thetransmitter UE-1, the transmitter UE-1 and/or the receiver UE-2 maychange the configuration(s) of the SL BWP 601 (e. , change to theconfiguration(s) of the SL BWP 601 where the transmitter UE-1 isconfigured). The transmitter UE-1 may transmit, to the receiver UE-2, anindication used for indicating the configuration(s) of the SL BWP 601where the transmitter UE-1 is configured.

Also, based on the configuration(s) of the SL BWP 601 for the receiverLTE-2, the transmitter UE-1 and/or the receiver UE-2 may change theconfiguration(s) of the SL BWP 601 (e.g., change to the configuration(s)of the SL MVP 601 where the receiver UE-2 is configured). The receiverUE-2 may transmit, to the transmitter UE-1, an indication used forindicating the configuration(s) of the SL BWP 601 where the receiverUE-2 is configured.

Here, the SL MVP 601 may be defined separately from Uu BWP(s) (e.g., theDL BWP(s) and-or the UL BWP(s)). For example, for the UE 602 in RRC_IDLERRC_IDLE state) and/or the UE 602 in out-of-coverage, one SL BWP 601 maybe (pre-) configured. Also, for the UE 602 that is RRC_CONNECTED (i.e.,in RRC_CONNECTED state), one SL BWP 601 may be active in a carrier.Namely, an activation and/or a deactivation may not be supported for theSL BWP 601. For example, no signaling may be exchanged in the SL for theactivation and/or the deactivation of the SL BWP 601.

Here, the SL BWP 601 may be linked with the DL BWP(s) and/or the ULBWP(s). For example, in a case that the index of the SL BWP 601 and theindex of the DL BWP(s) are the same, the SL BWP 601 and the DL BWP(s)may be considered as being linked. Also, in a case that the index of theSL BWP 601 and the index of the UL BWP(s) are the same, the SL BWP 601and the UL BWP(s) may be considered as being linked. Here, in a casethat the index of the DL BWP(s) and the index of the UL BWP(s) are thesame, the DL BWP(s) and the UL BWP(s) may be considered as being linked.

For example, for an unpaired spectrum operation(s) (e.g., operation(s)on an unpaired frequency band(s)), the UE 602 may identify, based on theindex of the SL BWP 601, the index of the DL BWP(s), and/or the index ofthe UL BWP(s), the linkage between the SL BWP 601 (e.g., the index ofthe SL BWP 601), the DL BWP(s) (e.g., the index of the DL BWP(s)),and/or the UL BWP(s) (e.g., the index of the UL BWP(s)).

Alternatively or additionally, (e.g., for a paired spectrum operation(s)(e.g., operation(s) on a paired frequency band(s))), the index of the DLBWP(s) and/or the index of the UL BWP(s) may be applied for the index ofthe SL BWP 601. For example, (e.g., for the paired spectrumoperation(s)), the UE 602 may apply the same index for the DL BWP(s) andthe SL BWP 601. Namely, the index of the DL BWP(s) may be used for theindex of the SL BWP 601. Alternatively or additionally, the UE 602 mayapply the same index for the DL BWP(s) and the SL BWP 601. Namely, theindex of the UL BWP(s) may be used for the index of the SL MVP 601.

For example, e.g., for the paired spectrum operation(s)), the gNB 660may configure to the UE 602, the index of the DL BWP(s) and/or the indexof the UL BWP(s). The configured index of the DL BWP(s) and/or theconfigured index of the UL BWP(s) may be used for the index of the SLBWP 601. Namely, only the index of the DL BWP(s) and/or only the indexof the UL BWP(s) may be configured to the UE 502. The index of the SLBWP 601 may not be configured to the UE 602. For example, in a case thatthe index of the SL BWP 601 is configured to the UE 602, the UE 602 mayidentify, based on the index of the SL BWP 601, the index of the SL MVP601. Also, in a case that the index of, the SL BWP 601 is not configuredto the UE 602, the UL 602 may identify, based on the index of the DLBWP(s) and/or the index of the UL BWP(s), the index of the SL BWP 501.

Also, (e.g., for the paired spectrum operation(s)), in a case that theindex of the SL BWP 601 is configured to the UE 602, the UE 602 mayidentify, based on the index of the SL BWP 601. the linkage between theSL BWP 601 (e.g., the index of the SL BWP 601), the DL BWP(s) (e.g., theindex of the DL BWP(s), and/or the UL BWP(s) (e.g., the index of the ULBWP(s)). Also, (e.g., for the paired spectrum operation(s)), in a casethat the index of the SL BWP 601 is not configured to the UE 602, the UE602 may identify, based on the index of the DL BWP(s) and/or the indexof the UL BWP(s), the linkage between the SL BWP 601 (e.g., the index ofthe SL BWP(s) 601), the DL BWP(s) (e.g., the index of the DL BWP(s),and/or the UL BWP(s) the index of the UL BWP(s)).

Here, (e.g., for the paired spectrum operation(s)), the index of the DLBWP(s) may be applied for the index of the UL BWP(s). Namely, the sameindex may be used for the DL BWP(s) and/or the UL BWP(s). Namely, thegNB 660 may configure to the UE 602, the index of the DL BWP(s). The UE602 may identify, based on the index of the DL BWP(s), the index of theUL BWP(s) and/or the index of the SL BWP 601. Also, the UE 602 mayidentify, based on the index of the DL MVP(s), the linkage between theSL BWP 601 (e.g., the index of the SL BWP(s) 601), the DL BWP(s) (e.g.,the index of the DL BWP(s)), and/or the UL BWP(s) (e.g., the index ofthe UL BWP(s)).

Alternatively or additionally, the transmitter UE-1 may configure to thereceiver UE-2, the one SL BWP 601. Here, the transmitter UE-1 may selectthe one SL BWP 601 within the UL BWP(s) configured by the gNB 560.Namely, the gNB 660 may configure to the transmitter UE-1, one or moreUL BWPs (e.g., at most four MVPs as described above). The transmitterUE-1 may select the one SL BWP 601 within the one or more UL BWPs.Namely, the one SL BWP 601 is configured (e.g., selected) from the ULBWP(s). For example, the one SL BWP 601 may be configured as a part ofthe UL BWP(s). Also, the one SL BWP 601 may be associated with one ofthe one or more UL BWP(s). Here, the gNB 560 may transmit to thetransmitter UE-1, by using the RRC message, information used forconfiguring (e.g., selecting) the one SL BWP 601 (e.g., from the one ormore UL BWPs). The transmitter UE-1 and the receiver UE-2 may performthe SL communication(s) on the one SL BWP 601 configured (e.g.,selected) within the one or more UL BWPs.

Alternatively or additionally, a resource pool 603 may be defined as aset of time-frequency resources used for the SL communication(s). Here,the time resource may include a set of slots, subframes, and/or OFDMsymbols, and/or groups of OFDM symbols. Also, the frequency resource mayinclude a set of PRBs. From the UE point of view, a resource pool 603may be inside the UE's bandwidth, within the SL BAP 601. Here, for theSL MVP 601, a single numerology (i.e., a subcarrier spacing and/or acyclic prefix) may be configured. Also, one or more resource pools 603may be (pre-) configured to the UE 602 in a carrier. Alternatively oradditionally, one or more resource pools 603 may be configured to the UE602 within the single SL BWP 601. Namely, as described above, the one ormore indices of the resource pools 603 may be configured for the singleSL BWP 601.

For example, the gNB 660 may transmit to the UE 602, by using the RRCmessage (e.g., system information block(s)), information used forconfiguring one or more resource pools 603 (e.g., within the SL BWP601). Namely, one or more indices of the resource pools 503 (e.g., theTx resource pool-id and/or Rx resource pool-id) may be associated withthe index of the SL BWP 601 (bwp-id). Also, the gNB 660 may transmit tothe UE 602, by using the dedicated RRC message, the information used forconfiguring one or more resource pools 603 (e.g., within the SL BWP601).

Also, the gNB 660 may transmit to the UE 602, by using the RRC message(e.g., system information block(s)), information used for configuringone resource(s) (e.g., within the resource pool(s) 603). Also, the gNB660 may transmit to the UE 602, by using the dedicated RRC message, theinformation used for configuring one resource(s) (e.g., within theresource pool(s) 603).

Also, the transmitter UE-1 may transmit to the receiver UE 2, by usingthe RRC message (e.g., system information block(s)), the informationused for configuring one or more resource pools 603 (e.g., within the SLBWP 601). Also, the transmitter UE-1 may transmit to the receiver UE-2,by using the dedicated RRC message, time information used forconfiguring one or more resource pools 603 e.g., within the SL BWP 601).

Also, the transmitter UE-1 may transmit to the receiver UE-2, by usingthe RRC message (e.g., system information block(s)), the informationused for configuring one resource(s) (e.g., within the resource pool(s)603). Also, the transmitter UE-1 may transmit to the receiver UE-2, byusing the dedicated RRC message, the information used for configuringone resource(s) within the resource pool(s) 603).

FIG. 7 shows examples of SL feedback control information (SFCI)transmission(s) 705. A first UE 702 a (referred to as a UE 702 or atransmitter UE-1) transmits data to a second UE 702 b (referred to as aUE 702 or a receiver UE-2).

As described above, SFCI 705 c (e.g., the SL HARQ feedback and/or the SLCSI reporting) may be transmitted from the receiver UE-2 to the,transmitter UE-1. Also, SFCI 705 a (e.g., the SL HARQ feedback and/orthe SL CSI reporting) may be transmitted from the transmitter UE-1 tothe gNB 760. Furthermore, SFCI 705 b (e.g., the SL HARQ feedback and/orthe SL CSI reporting) may be transmitted from the receiver UE-2 to thegNB 760.

Here, for the SL HARQ feedback and/or the SL CSI reporting, more thanone SFCI formats may be defined. For example, an SFCI format 1 may bedefined for transmission of the SL HARQ-ACK (e.g., the SL HARQ feedbackfrom the receiver UE-2 to the transmitter UE-1). Also, an SFCI format 2may be defined for transmission of the SL CSI (e.g., the SL CSIreporting from the receiver LTE-2 to the transmitter UE-1). Also, anSFCI 3 may be defined for transmission of the SL HARQ-ACK and the SL CSI(e.g., the SL HARQ feedback and the SL CSI reporting from the receiverUE-2 to the transmitter UE-1) Also, an SFCI 4 may be defined fortransmission of the SL HARQ-ACK and/or the SL CSI (e.g., the SL HARQfeedback and/or the SL CSI reporting from the UE 702 to the gNB 760).Namely, for the SL HARQ feedback to the transmitter UE-1 and the SL HARQfeedback to the gNB 760, different SCI format(s) may be defined. Also,for the SL CSI reporting to the transmitter UE-1 and the SL CSIreporting to the gNB 760, different SCI format(s) may be defined. Here,as described above, the SFCI 705 (i.e., SFCI format(s)) may betransmitted on the PSFCH.

For example, in a case that the SL HARQ feedback is enabled (e.g., forunicast), (e.g., in the case of non-CBG (i.e., Code Block Group)operation), the UE 702 may generate HARQ-ACK (e.g., a positiveacknowledgment) if it successfully decodes the corresponding TB(s).Also, the UE 702 may generate HARQ-NACK a negative acknowledgment) if itdoes not successfully decode the corresponding TB(s) after decoding theassociated PSCCH targeted to the UE 702. Here, the gNB 760 may transmitto the UE 702, e.g., by using the RRC message, information used forindicating that whether the SL HARQ feedback is enabled or not.

For example, as the SL HARQ feedback, the UE 702 may transmit HARQ-NACK(e.g., a negative acknowledgment) on the PSFCH if it fails to decode thecorresponding TB(s) after decoding the associated PSCCH, and transmit nosignal on the PSFCH otherwise (e.g., if it successfully decodes thecorresponding TB(s)). Also, as the SL HARQ feedback, the UE 702 maytransmit HARQ-ACK (e.g., a positive acknowledgment) on the PSFCH if itsuccessfully decodes the corresponding TB(s), and transmit HARQ-NACK(e.g., a negative acknowledgment) on the PSFCH if it does notsuccessfully decode the corresponding TB(s) after decoding theassociated PSCCH which targets the receiver UE-2.

Here, the HARQ feedback may be determined (e.g., defined) per resourcepool 703 (e.g., the Tx resource pool and/or Rx resource pool). Forexample, the number of the bits for the HARQ-ACK (e.g., a positiveacknowledgment and/or a negative acknowledgment) may be determined perresource pool 703. The number of bits for the HARQ-ACK may be associatedwith the PSSCH transmission(s) on each resource pool 703 (e.g., withinthe single SL BWP 701). For each resource pool 703, the UE 702 maydetermine the number of bits for the HARQ-ACK, and perform the HARQfeedback.

Alternatively or additionally, the HARQ feedback may be determined(e.g., defined) per SL BWP 701. For example, the number of the bits forthe HARQ-ACK (e.g., a positive acknowledgment and/or a negativeacknowledgment) may be determined per SL BWP 701. The number of bits forthe HARQ-ACK may be associated for the PSSCH transmission(s) on each SLBWP 701. For each SL BWP 701, the UE 702 may determine the number ofbits for the HARQ-ACK, and perform the HARQ feedback.

Alternatively or additionally. the SL CSI reporting may be determined(e.g., defined) per resource pool 703 (e.g., the Tx resource pool and/orRx resource pool). For example, the number of the bits for the SL CSImay be determined per resource pool 703. The number of bits for the SLCSI may be associated for the PSSCH transmission(s) on each resourcepool 703 (e.g., within the single SL BWP 701). For each resource pool703, the UE 702 may determine the number of bits for the SL CSI, andperform the SL CSI reporting.

Alternatively or additionally, the SL CSI may be determined (e.g.,defined) per SL BWP 701. For example, the number of the bits for the SLCSI may be determined per SL BWP 701. The number of bits for the SL CSImay be associated for the PSSCH transmission(s) on each SL BWP 701. Foreach SL BWP 701, the UE 702 may determine the number of bits for the SLCSI, and perform the SL CSI reporting.

For example, the SCSI-RS (e.g., a configuration(s) of the SCSI-RS) maybe associated with the resource pool(s) 703 (e.g., the Tx resourcepool(s) and/or Rx resource pool(s)). For example, the configuration(s)of the SCSI-RS may be associates with a single resource pool 703.Namely, the SCSI-RS (e.g., the configuration(s)) of the SCSI-RS) may beassociated with the index of resource pool(s) 703 (e.g., the index ofthe Tx resource pool(s) 703 (i.e., the Tx resource pool-id) and/or theindex of Rx resource pool (i.e., Rx resource pool-id)). For example, thegNB 760 may transmit, by using the RRC message, information used forconfiguring the SCSI-RS (i.e., the configurations) of the SCSI-RS)associated with the index of the resource pool(s) 703. The UE 702 maycalculate (e.g., acquire) the SL CSI based on the configuration(s) ofthe SCSI-RS, and perform the SL CSI reporting. For example, the UE 702may calculate the SL CSI based on the configuration(s) of the SCSI-RSassociated with the resource pool(s) 703, and perform the resourcepool-based SL CSI reporting.

As described above, the SCI format(s) may include the information usedfor indicating the resource pool(s) 703 (e.g., the Tx resource pool-idand/or Rx resource pool-id). For example, the SCI format 2, 3, and/or 4may be include the information used for indicating the resource pool(s)703. The information used for indicating the resource pool(s) 703included in the SCI format(s) may be linked with (e.g., paired with,linked to) the resource pool(s) 703 associated with the configuration(s)of the SCSI-RS.

For example, in a case that a first configurations(s) of the SCSI-RS(s)associated with the resource pool(s) 703 (e.g., an eighth resourcepool(s) 703) and the information used for indicating the resourcepool(s) 703 (e.g., the eighth resource pool(s) 703) is included in theSCI format 2, the SCI format 2 may be used for indicating the presenceof the SCSI-RS associated with the first configuration(s) of the SCSI-RS(e.g., in the slot(s) and/or the symbol(s)).

Also, in a case that a second configurations(s) of the SCSI-RS(s)associated with the resource pools) 703 (e.g., a ninth resource pool(s)703) and the information used for indicating the resource pool(s) 703(e.g., the ninth resource pool(s) 703) is included in the SCI format 3,the SCI format 3 may be used for requesting the SL CSI reporting basedon the SCSI-RS associated with the second configuration(s) of theSCSI-RS(s) (i.e., the reporting of SL CSI calculated based on (e.g., byusing) the second configuration(s) of the SCSI-RS(s)).

Also, in a case that a third configurations(s) of the SCSI-RS(s)associated with the resource pool(s) 703 (e.g.,. a tenth resourcepool(s) 703) and the information used for indicating the resourcepool(s) 703 (e.g., the tenth resource pool(s) 703) is included in theSCI format 4, the SCI format 4 may be used for requesting thetransmission(s) of the SCSI-RS associated with the thirdconfiguration(s) of the SCSI-RS(s) (e.g., in the slot(s) and/or thesymbol(s)).

Alternatively or additionally, the SCSI-RS (e.g., the configuration(s)of the SCSI-RS) may be associated with the SL BWP(s) 701. For example,the configuration(s) of the SCSI-RS may be associated with a single SLBR P 701. Namely, the SCSI-RS (e.g., the configuration(s)) of theSCSI-RS) may be associated with the index of SL BWP(s) 701 (e.g., theindex of the SL MVP(s) 701 (i.e., bwp-id)). For example, the gNB 750 maytransmit, by using the RRC message, information used for configuring theSCSI-RS (i.e., the configurations) of the SCSI-RS) associated with theindex of the SL BWP(s) 701. The UE 702 may calculate (e.g., acquire) theSL CSI based on the configuration(s) of the SCSI-RS, and perform the SLCSI reporting. For example, the UE 702 may calculate the SL CSI based onthe configuration(s) of the SCSI-RS associated with the SL BWP(s) 701,and perform the SL BWP-based SL CSI reporting.

As described above, the SCI format(s) may include the information usedfor indicating the SL BWP(s) 701 (e.g., bwp-id). For example, the SCIformat 2, 3, and/or 4 may be include the information used for indicatingthe SL BWP(s) 701. The information used for indicating the SL BWP(s) 701included in the SCI format(s) may be linked with (e.g., paired with,linked to) the SL BWP(s) 701 associated with the configuration(s) of theSCSI-RS.

For example, in a case that a fourth configurations(s) of the SCSI-RS(s)associated with the SL BWP(s) 701 (e.g., a first SL BWP(s) 701) and theinformation used for indicating the SL BWP(s) 701 (e.g., the first SLBWP(s) 701) is included in the SCI format 2, the SCI format 2 may beused for indicating the presence of the SCSI-RS associated with thefourth configuration(s) of the SCSI-RS (e.g., in the slot(s) and/or thesymbol(s)).

Also, in a case that a fifth configurations(s) of the SCSI-RS(s)associated with the SL BWP(s) 701 (e.g., a second SL BWP(s) 701) and theinformation used for indicating the SL BWP(s) 701 (e.g., the second SLBWP(s) 701) is included in the SCI format 3, the SCI format 3 may beused for requesting the SL CSI reporting based on the SCSI-RS associatedwith the fifth configuration(s) of the SCSI-RS(s) (i.e., the reportingof SL CSI calculated based on e.g., by using) the fifth configuration(s)of the SCSI-RS(s)).

Also, in a case that a sixth configurations(s) of the SCSI-RS(s)associated with the SL BWP(s) 701 (e.g., a third SL BWP(s) 701) and theinformation used for indicating the SL BWP(s) 701 (e.g., the third SLBWP(s) 701) is included in the SCI format 4, the SCI format 4 may beused for requesting the transmissions) of the SCSI-RS associated withthe sixth configuration(s) of the SCSI-RS(s) (e.g., in the slot(s)and/or the symbol(s)).

Here, the SCI format(s) (e.g., the SCI format(s) 0, 1, 2, 3, 4, 5,and/or 6) may include information used for identifying a linkage (e.g.,a pairing) between the configuration(s) of the SCSI-RS(s) and the SCIformat(s) (e.g., the content(s) of the SCI format(s)).

The information used for identifying the linkage between theconfiguration(s) of the SCI format(s) and the SCI format(s) may beinformation used for indicating the presence of the SCSI-RS (e.g., inthe slot(s) and/or the symbol(s)). For example, the information used forindicating the presence of the SCSI-RS may be included in the SCI format2. For example, more than one-bit information may be defined for theinformation used for indicating the presence of the SCSI-RS.

And, in a case that the “0” is set to the information used forindicating the present of the SCSI-RS, the SCSI-RS may not be present(e.g., in the slot(s) and/or the symbol(s)). Also, in a case that avalue(s) other than “0” is set to the information used for indicatingthe presence of the SCSI-RS, the SCSI-RS may be present (e.g., in theslot(s) and/or the symbol(s)). Here, the configuration(s) of theSCSI-RS(s) may be associated with the value(s) of the information usedfor indicating the presence of the SCSI-RS Here, the value(s) may bereferred as a state(s) (e.g., a state(s) of the indication of thepresence of the SCSI-RS(s)).

For example, in a case that a seventh configurations(s) of theSCSI-RS(s) is associated with the state of the indication of thepresence of the SCSI-RS(s) (e.g., a value “01” of 2-bit information) andthe information used for indicating the presence of the SCSI-RS(s)(e.g., 2-bit information) is set to the value “01”, the SCSI-RSassociated with the seventh configuration(s) of the SCSI-RS may bepresent (e.g., in the slot(s) and/or the symbol(s)). Here, as describedabove, the seventh configuration(s) of the SCSI-RS(s) may be associatedwith the resource pool(s) 703 and/or the SL BWP(s) 701. Namely, the UE702 may identify the configuration(s) of the SCSI-RS(s) based on thestate(s) of the information used for indicating the presence of theSCSI-RS(s) (e.g., the information used for indicating the linkagebetween the configuration(s) of the SCSI-RS and the SCI format(s)).

Also, the information used for identifying the linkage between theconfiguration(s) of the SCI format(s) may be information used forrequesting the SL CSI reporting (e.g., SL CSI request field). Forexample, the information used for requesting the SL CSI reporting may beincluded in the SCI format 3. For example, more than one-bit informationmay be defined for the information used for requesting the SL CSIreporting.

And, in a case that “0” is set as the information used for requestingthe SL CST reporting, the SL CSI reporting may not be requested. Also,in a case that a value(s) other than “0” is set as the information usedfor requesting the SL CSI reporting, the SL CSI reporting may berequested. Here, the configuration(s) of the SCSI-RS(s) may beassociated with the value(s) of the information used for requesting theSL CSI reporting. Here, the value(s) may be referred as a state(s) astate(s) of a triggering of the SL CSI reporting, a triggering state ofthe SL CSI reporting).

For example, in a case that an eighth configurations(s) of theSCSI-RS(s) is associated with the triggering state of the SL CSIreporting (e.g., a value “01” of 2-bit information) and the informationused for requesting the SL CSI reporting (e.g., 2-bit information) isset to the value “01”, the SL CSI reporting associated with the eighthconfiguration(s) of the SCSI-RS(s) may be requested. For example, the SLCSI reporting based on (e.g.,. calculated by using) the eighthconfiguration of the SCSI-RS(s) may be requested. Here, as describedabove, the eighth configuration(s) of the SCSI-RS(s) may be associatedwith the resource pool(s) 703 and/or the SL BWP(s) 701. Namely, the UE702 may identify the configuration(s) of the SCSI-RS(s) based on thetriggering state(s) of the information used for requesting the SL CSIreporting (e.g., the information used for indicating the linkage betweenthe configuration(s) of the SCSI-RS and the SCI format(s)).

Also, the information used for identifying the linkage between theconfiguration(s) of the SCI format(s) may be information used forrequesting the transmission(s) of the SCSI-RS(s) (e.g., SCSI-RS requestfield). For example, the information used for requesting thetransmission(s) of the SCSI-RS(s) may be included in the SCI format 4.For example, more than one-bit information may be defined for theinformation used for requesting the SF CSI reporting.

And, in a case that “0” is set as the information used for requestingthe transmission(s) of the SCSI-RS(s), the transmission(s) of theSCSI-RS(s) may not be requested. Also, in a case that a value(s) otherthan “0” is set as the information used for requesting thetransmission(s) of the SCSI-RS(s), the transmission(s) of the SCSI-RS(0may be requested. Here, the configuration(s) of the SCSI-RS(s) may beassociated with the value(s) of the information used for requesting thetransmission(s) of the SCSI-RS(s). Here, the value(s) may be referred asa state(s) a state(s) of a triggering of the SCSI-RS transmission, atriggering state of the SCSI-RS transmission).

For example, in a case that a ninth configurations(s) of the SCSI-RS(s)is associated with the triggering state of the SCSI-RS transmission(e.g., a value “01” of 2-bit information) and the information used forrequesting the SCSI-RS transmission (e.g., 2-bit information) is set tothe value “01”, the SCSI-RS transmission(s) associated with the ninthconfigurations) of the SCSI-RS(s) may be requested. For example, theSCSI-RS transmission based on the ninth configuration(s) of theSCSI-RS(s) may be requested. Here, as described above, the ninthconfiguration(s) of the SCSI-RS(s) may be associated with the resourcepool(s) 703 and/or the SL BWP(s) 701. Namely, the UE 702 may identifythe configuration(s) of the SCSI-RS(s) based on the triggering state(s)of the information used for requesting the SCSI-RS transmission (e.g.,the information used for indicating the linkage between theconfiguration(s) of the SCSI-RS and the SCI format(s)).

Here, the first, the second, the third, the fourth, the fifth, thesixth, the seventh, the eighth, the ninth, and/or the tenth resourcepool(s) 703 may be the same and/or different.

Also, the first, the second, the third, the fourth, the fifth, thesixth, the seventh, the eighth, and/or the ninth configuration(s) of theSCSI-RS(s) may be the same and/or different.

Also, the first, the second, and/or the third SL BWP(s) 701 may be thesame and/or different.

FIG. 8 is a block diagram illustrating one implementation of a UE 802.The UE 802 may include a higher layer processor 823, a UL transmitter851, a DL receiver 843, and one or more antenna 831. The UL transmitter851 may include a PUCCH transmitter 853 and a PUSCH transmitter 855. TheDL receiver 843 may include a PDCCH receiver 845 and a PDSCH receiver847.

The higher layer processor 823 may manage physical layer's behaviors(the UL transmitter's and the DL receiver's behaviors) and providehigher layer parameters to the physical layer. The higher layerprocessor 823 may obtain transport blocks from the physical layer. Thehigher layer processor 823 may send/acquire higher layer messages suchas an RRC message and MAC message to/from a UE's higher layer. Thehigher layer processor 823 may provide the PUSCH transmitter transportblocks and provide the PUCCH transmitter 853 UCI.

The DL receiver 843 may receive multiplexed downlink physical channelsand downlink physical signals via receiving antennas 831 andde-multiplex them, The PDCCH receiver 845 may provide the higher layerprocessor 823 DCI. The PDSCH receiver 847 may provide the higher layerprocessor 823 received transport blocks.

FIG. 9 is a block diagram illustrating one implementation of a gNB 960.The gNB 960 may include a higher layer processor 923, a DL transmitter925, a UL receiver 933, and one or more antenna 931. The DL transmitter925 may include a PDCCH transmitter 927 and a PDSCH transmitter 929. TheUL receiver 933 may include a PUCCH receiver 935 and a PUSCH receiver937.

The higher layer processor 923 may manage physical layer behaviors (ofthe DL transmitter and the UL receiver) and provide higher layerparameters to the physical layer. The higher layer processor 923 mayobtain transport blocks from the physical layer. The higher layerprocessor 923 may send/acquire higher layer messages such as au RRCmessage and MAC message to/from a UE's higher layer. The higher layerprocessor 923 may provide the PDSCH transmitter transport blocks andprovide the PDCCH transmitter transmission parameters related to thetransport blocks.

The DL transmitter 925 may multiplex downlink physical channels anddownlink physical signals (including a reservation signal) and transmitthem via transmission antennas 931. The UL receiver 933 may receivemultiplexed uplink physical channels and uplink physical signals viareceiving antennas 931 and de-multiplex them The PUCCH receiver 935 mayprovide the higher layer processor 923 with UCI. The PUSCH receiver 937may provide the higher layer processor 923 with received transportblocks.

FIG. 10 illustrates various components that may be utilized in a LTE1002. The UE 1002 described in connection with FIG. 10 may beimplemented in accordance with the UE 102 described in connection withFIG. 1. The UE 1002 includes a processor 1003 that controls operation ofthe UE 1002. The processor 1003 may also be referred to as a centralprocessing unit (CPU). Memory 1005, which may include read-only memory(ROM), random access memory (RAM), a combination of the two or any typeof device that may store information, provides instructions 1007 a anddata 1009 a to the processor 1003. A portion of the memory 1005 may alsoinclude non-volatile random-access memory (NVRAM). Instructions 1007 band data 1009 b may also reside in the processor 1003. Instructions 1007b and/or data 1009 b loaded into the processor 1003 may also includeinstructions 1007 a and/or data 1009 a from memory 1005 that were loadedfor execution or processing by the processor 1003. The instructions 1007b may be executed by the processor 1003 to implement the methodsdescribed above.

The UE 1002 may also include a housing that contains one or moretransmitters 1058 and one or more receivers 1020 to allow transmissionand reception of data. The transmitter(s) 1058 and receiver(s) 1020 maybe combined into one or more transceivers 1018. One or more antennas1022 a-n are attached to the housing and electrically coupled to thetransceiver 1018.

The various components of the UE 1002 are coupled, together by a bussystem 1011, which may include a power bus, a control signal bus and astatus signal bus, in addition to a data bus. However, for the sake ofclarity, the various buses are illustrated in FIG. 10 as the bus system1011. The UE 1002 may also include a digital signal processor (DSP) 1013for use in processing signals. The UE 1002 may also include acommunications interface 1015 that provides user access to the functionsof the UE 1002. The UE 1002 illustrated in FIG. 10 is a functional blockdiagram rather than a listing of specific components.

FIG. 11 illustrates various components that may be utilized in a gNB1160. The gNB 1160 described in connection with FIG. 11 may beimplemented in accordance with the gNB 160 described in connection withFIG. 1 The gNB 1160 includes a processor 1103 that controls operation ofthe gNB 1160. The processor 1103 may also be referred to as a centralprocessing unit (CPU). Memory 1105, which may include read-only memory(ROM), random access memory (RAM), a combination of the two or any typeof device that may store information, provides instructions 1107 a anddata 1109 a to the processor 1103. A portion of the memory 1105 may alsoinclude non-volatile random-access memory (NVRAM). Instructions 1107 band data 1109 b may also reside in the processor 1103. Instructions 1107b and/or data 1109 b loaded into the processor 1103 may also includeinstructions 1107 a and/or data 1109 a from memory 1105 that were loadedfor execution or processing by the processor 1103. The instructions 1107b may be executed by the processor 1103 to implement the methodsdescribed above.

The gNB 1160 may also include a housing that contains one or moretransmitters 1117 and one or more receivers 1178 to allow transmissionand reception of data. The transmitter(s) 1117 and receiver(s) 1178 maybe combined into one or more transceivers 1176. One or more antennas1180 a-n are attached to the housing and electrically coupled to thetransceiver 1176.

The various components of the gNB 1160 are coupled together by a bussystem 1111, which may include a power bus, a control signal bus and astatus signal bus, in addition to a data bus. However, for the sake ofclarity, the various buses are illustrated in FIG. 11 as the bus system1111. The gNB 1160 may also include a. digital signal processor (DSP)1113 for use in processing signals. The gNB 1160 may also include acommunications interface 1115 that provides user access to the functionsof the gNB 1160. The gNB 1150 illustrated in FIG. 11 is a functionalblock diagram rather than a listing of specific components.

FIG. 12 is a block diagram illustrating one implementation of a UE 1202in which configurations for V2X communication may be implemented. The UE1202 includes transmit means 1258, receive means 1220 and control means1224. The transmit means 1258, receive means 1220 and control means 1224may be configured to perform one or more of the functions described inconnection with FIG. 1 above. FIG. 10 above illustrates one example of aconcrete apparatus, structure of FIG. 12. Other various structures maybe implemented to realize one or more of the functions of FIG. 1. Forexample, a DSP may be realized by software.

FIG. 13 is a block diagram illustrating one implementation of a gNB 1360in which configurations for V2X communication may be implemented. ThegNB 1360 includes transmit means 1323, receive means 1378 and controlmeans 1382. The transmit means 1323, receive means 1378 and controlmeans 1382 may be configured to perform one or more of the functionsdescribed in connection with FIG. 1 above. FIG. 11 above illustrates oneexample of a concrete apparatus structure of FIG. 13. Other variousstructures may be implemented to realize one or more of the functions ofFIG. 1. For example, a DSP may be realized by software.

FIG. 14 is a flow diagram illustrating a communication method 1400 of auser equipment (UE) 102 that performs a sidelink (SL) communication(s).The UE 102 may receive 1402 a radio resource control (RRC) message thatincludes first information used for configuring one or more resourcepools for SL transmission(s) within an SL bandwidth part (SL MVP). TheUE 102 may receive 1404 an RRC message that includes second informationused for configuring a monitoring occasion(s) for a physical SL controlchannel (PSCCH). The information used for configuring the monitoringoccasion(s) for the PSCCH is configured for each of the one or moreresource pools for the SL transmission(s). The UE 102 may monitor 1406the PSCCH based on the second information. The UE 102 may perform 1408SL communication(s) on a physical SL shared channel (PSSCH). The PSSCHis scheduled by using an SL control information (SCI) format on thePSSCH.

FIG. 15 is a flow diagram illustrating a communication method 1500 of abase station apparatus (e.g., a gNB) 160. The gNB 160 may transmit 1502a radio resource control (RRC) message that includes first informationused for configuring one or more resource pools for SL transmission(s)within an SL bandwidth part SL BWP). The gNB 160 may transmit 1504 anRRC message that includes second information used for configuring amonitoring occasion(s) for a physical SL control channel (PSCCH). Theinformation used for configuring the monitoring occasion(s) for thePSCCH is configured for each of the one or more resource pools for theSL transmission(s). A UE 102 may monitor the PSCCH based on the secondinformation. SL communication(s) may be performed 1506 on a. physical SLshared channel (PSSCH). The PSSCH is scheduled by using an SL controlinformation (SCI) format on the PSSCH.

It should be noted that names of physical channels described herein areexamples. The other names such as “NRPDCCH, NRPDSCH, NRPUCCH andNRPUSCH”, “new Generation-(G)PDCCH, GPDSCH, GPUCCH and GPUSCH” or thelike can be used.

The term “computer-readable medium” refers to any available medium thatcan be accessed by a computer or a processor. The term“computer-readable medium,” as used herein, may denote a computer-and/or processor-readable medium that is non-transitory and tangible. Byway of example, and not limitation, a computer-readable orprocessor-readable medium may comprise RAM, ROM, EEPROM, CD-ROM or otheroptical disk storage, magnetic disk storage or other magnetic storagedevices, or any other medium that can be used to carry or store desiredprogram code in the form of instructions or data structures and that canbe accessed by a computer or processor. Disk and disc, as used herein,includes compact disc (CD), laser disc, optical disc, digital versatiledisc (DVD), floppy disk and Blu-ray® disc where disks usually reproducedata magnetically, while discs reproduce data optically with lasers.

It should be noted that one or more of the methods described herein maybe implemented in and/or performed using hardware. For example, one ormore of the methods described herein may be implemented in and/orrealized using a chipset, an application-specific integrated circuit(ASIC), a large-scale integrated circuit (LSI) or integrated circuit,etc.

Each of the methods disclosed herein comprises one or more steps oractions for achieving the described method. The method steps and/oractions may be interchanged with one another and/or combined into asingle step without departing from the scope of the claims. In otherwords, unless a specific order of steps or actions is required forproper operation of the method that is being described, the order and/oruse of specific steps and/or actions may be modified without departingfrom the scope of the claims.

It is to be understood that the claims are not limited to the preciseconfiguration and components illustrated above. Various modifications,changes and variations may be made in the arrangement, operation anddetails of the systems, methods, and apparatus described herein withoutdeparting from the scope of the claims.

A program running on the gNB 160 or the UE 102 according to thedescribed systems and methods is a program (a program for causing acomputer to operate) that controls a CPU and the like in such a manneras to realize the function according to the described systems andmethods. Then, the information that is handled in these apparatuses istemporarily stored in a RAM while being processed. Thereafter, theinformation is stored in various ROMs or HDDs, and whenever necessary,is read by the CPU to be modified or written. As a recording medium onwhich the program is stored, among a semiconductor (for example, a ROM,a nonvolatile memory card, and the like), an optical storage medium (forexample, a DVD, a MO, a MD, a CD, a BD, and the like), a magneticstorage medium (for example, a magnetic tape, a flexible disk, and thelike), and the like, may be possible. Furthermore, in some cases, thefunction according to the described systems and methods described aboveis realized by running the loaded program, and in addition, the functionaccording to the described systems and methods is realized inconjunction with an operating system or other application programs,based on an instruction from the program.

Furthermore, in a case where the programs are available on the market,the program stored on a portable recording medium can be distributed orthe program can be transmitted to a server computer that connectsthrough a network such as the Internet. In this case, a storage devicein the server computer also is included. Furthermore, some or all of thegNB 160 and the UE 102 according to the systems and methods describedabove may be realized as an LSI that is a typical integrated circuit.Each functional block of the gNB 160 and the UE 102 may be individuallybuilt into a chip, and some or all functional blocks may be integratedinto a. chip. Furthermore, a technique of the integrated circuit is notlimited to the LSL and an integrated circuit for the functional blockmay be realized with a dedicated circuit or a general-purpose processor.Furthermore, if with advances in a semiconductor technology, atechnology of an integrated circuit that substitutes for the LSIappears, it is also possible to use an integrated circuit to which thetechnology applies.

Moreover, each functional block or various features of the base stationdevice and the terminal device used in each of the aforementionedimplementations may be implemented or executed by a circuitry, which istypically an integrated circuit or a plurality of integrated circuits.The circuitry designed to execute the functions described in the presentspecification may comprise a general-purpose processor, a digital signalprocessor (DSP), an application specific or general applicationintegrated circuit (ASIC), a field programmable gate array (FPGA), orother programmable logic devices, discrete gates or transistor logic, ora discrete hardware component, or a combination thereof. Thegeneral-purpose processor may be a microprocessor, or alternatively, theprocessor may be a conventional processor, a controller, amicrocontroller or a state machine. The general-purpose processor oreach circuit described above may be configured by a digital circuit ormay be configured by an analogue circuit. Further, when a technology ofmaking into an integrated circuit superseding integrated circuits at thepresent time appears due to advancement of a semiconductor technology,the integrated circuit by this technology is also able to be used.

As used herein, the term “and/or” should be interpreted to mean one ormore items. For example, the phrase “A, B and/or C” should beinterpreted to mean any of: only A, only B, only C, A and B (but not C),B and C (but not A), A and C (but not B), or all of A, B, and C. As usedherein, the phrase “at least one of” should be interpreted to mean oneor more items. For example, the phrase “at least one of A, B and C” orthe phrase “at least one of A, B or C” should be interpreted to mean anyof only A, only B, only C, A and B (but not C), B and C (but not A), Aand C (but not B), or all of A, B, and C. As used herein, the phrase“one or more of” should be interpreted to mean one or more items. Forexample, the phrase “one or more of A, B and C” or the phrase “one ormore of A, B or C” should be interpreted to mean any of: only A, only B,only C, A and B (but not C), B and C (but not A), A and C (but not B),or all of A, B, and C.

<Summary>

In one example, a user equipment that performs a sidelink (SL)communication(s) comprising: receiving circuitry configured to receive aradio resource control (RRC) message comprising first information usedfor configuring one or more resource pools for SL transmission(s) withinan SL bandwidth part (SL BWP); the receiving circuitry configured toreceive an RRC message comprising second information used forconfiguring a monitoring occasions) for a physical SL control channel(PSCCH), the information used for configuring the monitoring occasion(s)for the PSCCH being configured for each of the one or more resourcepools for the SL transmission(s); and the receiving circuitry configuredto monitor the PSCCH based on the second information, and transmittingcircuity configured to perform SL communication(s) on a physical SLshared channel (PSSCH), the PSSCH being scheduled by using an SL controlinformation (SCI) format on the PSSCH.

In one example, a base station apparatus comprising: transmittingcircuitry configured to transmit a radio resource control (RRC) messagecomprising first information used for configuring one or more resourcepools for sidelink (SL) transmission(s) within an SL bandwidth part (SLBWP); and the transmitting circuitry configured to transmit an RRCmessage comprising second information used for configuring a monitoringoccasion(s) for a physical SL control channel (PSCCH), the informationused for configuring the monitoring occasion(s) for the PSCCH beingconfigured for each of the one or more resource pools for the SLtransmission(s), wherein the PSCCH is monitored based on the secondinformation, and SL communication(s) is performed on a physical SLshared channel (PSSCH), the PSSCH being scheduled by using an SL controlinformation (SCI) format on the PSSCH.

In one example, a communication method of a user equipment that performsa sidelink (SL) communication(s) comprising: receiving a radio resourcecontrol (RRC) message comprising first information used for configuringone or more resource pools for SL transmission(s) within an SL bandwidthpart (SL BWP); receiving an RRC message comprising second informationused for configuring a monitoring occasion(s) for a physical SL controlchannel (PSCCH), the information used for configuring the monitoringoccasion(s) for the PSCCH being configured for each of the one or moreresource pools for the SL transmission(s); monitoring the PSCCH based onthe second information; and performing SL communication(s) on a physicalSL shared channel (PSSCH), the PSSCH being scheduled by using an SLcontrol information (SCI) format on the PSSCH.

In one example, a. communication method of a base station apparatuscomprising: transmitting a radio resource control (RRC) messagecomprising first information used for configuring one or more resourcepools for SL transmission(s) within an SL bandwidth part (SL BWP); andtransmitting au RRC message comprising second information used forconfiguring a monitoring occasion(s) for a physical SL control channel(PSCCH), the information used for configuring the monitoring occasion(s)for the PSCCH being configured for each of the one or more resourcepools for the SL transmission(s), wherein the PSCCH is monitored basedon the second information, and SL communication(s) is performed on aphysical SL shared channel (PSSCH), the PSSCH being scheduled by usingan SL control information (SCI) format on the PSSCH.

1-4. (canceled)
 5. A user equipment for performing sidelink (SL)communications, comprising: receiving circuitry configured to receive aradio resource control (RRC) message comprising first information usedfor configuring one or more resource pools for at least one SLtransmission within one or more SL bandwidth parts (BWPs); determiningcircuitry configured to select an SL resource for transmission of aPhysical Sidelink Control Channel (PSCCH) and a Physical Sidelink SharedChannel (PSSCH) associated with the PSCCH; and transmitting circuitryconfigured to transmit first-stage SL control information (SCI) over thePSCCH and to transmit the PSSCH associated with the PSCCH, wherein:second-stage SCI is carried on the PSSCH, and the first-stage SCIprovides scheduling information of the PSSCH, and indicates a format ofthe second-stage SCI.
 6. The user equipment according to claim 5,wherein the SL resource is indicated by Downlink Control Information(DCI) received from a base station apparatus.
 7. The user equipmentaccording to claim 5, wherein the SL resource is selected by the userequipment.
 8. The user equipment according to claim 5, wherein thereceiving circuitry is further configured to receive a physical SLfeedback channel (PSFCH) comprising information related to decodingresults of the PSSCH.
 9. The user equipment according to claim 5,wherein the transmitting circuitry is further configured to transmitinformation related to decoding results of the PSSCH to a base stationapparatus.
 10. A communication method performed by a user equipment forperforming sidelink (SL) communications, the method comprising:receiving a radio resource control (RRC) message comprising firstinformation used for configuring one or more resource pools for at leastone SL transmission within one or more SL bandwidth parts (BWPs);selecting an SL resource for transmission of a Physical Sidelink ControlChannel (PSCCH) and a Physical Sidelink Shared Channel (PSSCH)associated with the PSCCH; transmitting first-stage SL controlinformation (SCI) over the PSCCH; and transmitting the PSSCH associatedwith the PSCCH, wherein: second-stage SCI is carried on the PSSCH, andthe first-stage SCI provides scheduling information of the PSSCH, andindicates a format of the second-stage SCI.
 11. The communication methodaccording to claim 10, wherein the SL resource is indicated by DownlinkControl Information (DCI) received from a base station apparatus. 12.The communication method according to claim 10, wherein the SL resourceis selected by the user equipment.
 13. The communication methodaccording to claim 10, further comprising: receiving a physical SLfeedback channel (PSFCH) comprising information related to decodingresults of the PSSCH.
 14. The communication method according to claim10, further comprising: transmitting information related to decodingresults of the PSSCH to a base station apparatus.